Airmail Flights LACSA First Flights, RFC 003:4-5, 1979 First Flight: San Salvador-San Jose, RFC 013:2-3, 1980 LACSA First Flight: San Jose-Los Angeles, RFC 014:3-4, 1980 Pan Am First Flight Fraudulent Cover, RFC 015:2-3, 1980 ENTA First Airmail Flights, RFC 030:5-7, 31:9-10, 82 50th Anniversary of a CR Pilot's First Flight, RFC 044:2-7, 1983 USA Military Flights in November and December 1928, RFC 051:2-4, 1984 Airmail Week in 1932, RFC 068:1-2, 1985 Pan Am First Direct Flights from Texas to CR, RFC 081:4-5, 1987 TACA First Flights, RFC 083:4-6, 1987 KLM First Flight Via San Jose-Europe, RFC 091:2-3, 1988 First CR International Airmail, RFC 093:6, 1988 TACA First Flights More Information, RFC 099:4-6, 1989 ENTA First Flights, RFC 107:1-6, 1989 Pan American First Jet Flight to CR, RFC 110:5-6, 1990 Second Lindbergh Flight to CR (2/6/29), RFC 123:4-6, 1991 Third Flight Canal Zone-CR-Canal Zone (12/30/27), RFC 124:6, 1991 First CR International Airmail, RFC 148:2-5, 1993 First Local Airmail San Jose-Limon 1924, RFC 156:3-4, 1993 LACSA First Flights, RFC 190:5-6, 1996 Pan American Flight of 1926-27, RFC 207:1-6, 1998 Canal Zone-Costa Rica Second Experimental Flight, RFC 208:4-5, 1998 The Second Canal Zone-Costa Rica Experimental Flight, RFC 215:3-6, 1998 Pablo Sidar Flights in Costa Rica , RFC 216:5-6, 1998 Concorde Plane in Costa Rica, RFC 217:2-4, 1999 Experimental Flight in Mexico 1932, RFC 252:4-5, 2001 Airmail Flight of 1936, RFC 280:1, 2004 Mancomum Mail Costa Rica SCADTA, RFC 299:1-4, 2005 More About Mancomun SCADTA Flights, RFC 300:34, 2005 Important Information about the 1924 Flights, RFC 320:4-5, 2009 President's signatures on a First Flight Cover in Central America, RFC 332:2-6, 2011 Pan Am First Flights in CR, RFC 355:3-6, 2014 Test Flight to Mexico in 1932, RFC 364:4-5, 2015 Pan American Flight of 1926-27, RFC 369:1-6, 2015 Mancomum Mail Costa Rica SCADTA Duplicate, RFC 373:1-3, 2015 ENTA First Flights Part I, RFC 375:2-5, 2015 ENTA First Flights Part II, RFC 376:1-3, 2015 Experimental International Mail Flight of 1921, RFC 384:1-8, 2016 Canal Zone-Costa Rica Second Experimental Flight Duplicate, RFC 387:5-6, 2016 Pan Am Contract to Establish Air Service in CR, RFC 392:1-8, 2016

Albums New Costa Rica Album, RFC 233:6, 2000 Album of the First Century CR Stamps, RFC 239:2-3, 2000 Postal Stationery Album by A. Castro, RFC 265:1, 2003

Ambulantes/Railroads Bernardo Soto and the CR Railroads I, RFC 234:4-7, 2000 Bernardo Soto and the CR Railroads ll, RFC 235:4-6, 2000 Ambulante Mail of Cairo Spur, RFC 279:1-3, 2004 Railroad Inauguration San Jose Heredia , RFC 323:5-6, 2009 Postal Service of the Atlantic Railroad, RFC 328:1-6, 2011 Railroad Postal Service in CR, RFC 344:1-6, 2014

Awards Cossio Awards, RFC 022:1, 1981 Grand Awards in National Exhibitions, RFC 056:1, 1984 Costa Rican Awards in CAPEX 87, RFC 081:1, 1987 ESPAMER 87 CR Awards, RFC 083:1, 1987 Finlandia 88 Awards, RFC 090:1, 1988 India 89 Awards, RFC 095:1, 1988 India '89 CR Awards, RFC 099:2, 1989 New Zealand 90 Awards, RFC 116:4-6, 1990 AIJP Award to Fred O'Neill, RFC 131:6, 1991 EXFILCORI 91 Special Awards, RFC 132:6, 1991 Philanippon 91 CR Awards, RFC 133:1, 1992 Granada 92 CR Awards, RFC 137:1, 1992 Bangkok '93 Awards, RFC 154:4-6, 1993 Costa Rica '95 Palmares, RFC 181:3, 1996 Costa Rica '97 Grand Prize, RFC 203:1, 1997 Grand Prizes in Costa Rica Exhibits, RFC 210:1, 1998 FIAF Medal to Fred O'Neill, RFC 240:1, 2000 FIAF Medal to Fred O'Neill, RFC 247:4. 2001 III Exposicion Filatelica Hispano Costarricense Palmares, RFC 249:5-6, 2001 ULACIT Prize for Cardenal Oscar A Rodriguez, RFC 255:2-3, 2002 FIAF Special Merit Prize to F. O'Neill, RFC 317:1. 2008 Alvaro Castro win medal in Philakorea 2014, RFC 355:1, 2014 FIAF hnors Fred O'Neill, RFC 357:2. 2014 F. O'Neill 50 Years in the AIJP Membership, RFC 390:1, 2016

Bar Cancels Bar Cancel on Saenz 211b, RFC 019:6-7, 1981

Blocks/Strips Block of the 5 Cts UPU, RFC 024:5, 1981 Strip of Sc 37a, RFC 038:4, 1983 Block of 16 of Sc 94, RFC 066:3-4, 1985 Complete Sheet of 4 Reales, RFC 143:4-5, 1992 Illustration of a Block of 25 of Un Peso First Issue, RFC 144:3, 1992 Rare block of 9 of 1934 Air Mail Issue, RFC 244:1, 2001

Cancellations Cancellations on the First Issue, RFC 003:2, 1979 Cancellations on the First Issue, RFC 016a:1-9, 1980 Telegraph Cancellation, RFC 018:2, 21:3, 1980 Perforated Cancellations, RFC 020:7, 1981 Perforated Cancellations on 1910 Telegraph Stamps, RFC 024:3-4, 1981 Paquebot Cancellation of the Great White Fleet, RFC 034:4-6, 1983 Cancellations on the First Issue, RFC 045:2, 1983 First Issue Interesting Cancellation, RFC 058:2, 1984 Guanacaste Cancellations, RFC 084:4-6, 1987 Cancellation on 1920 Cover, RFC 098:1. 1989 Illustration of Sc 47 on Cover with Unusual Cancellation, RFC 143:6, 1992 Rhomboid Cancellation on the First Issue, RFC 210:2-3, 1998 Cancellation "S Mateo", RFC 225:2-4, 1999 Rhomboid Cancellation on the First Issue, RFC 277:3-6, 2004 Coco Island Issue of 1936: Study of Cancellations, RFC 280:3-5, 2004 Machine Cancellation in the 1936 Coco Island Issue, RFC 281:3, 2004 Seldom Known Cancellation of Guanacaste, RFC 282:2-4, 2004 Blank Secretary of Finance Cancellation on 1870 Revenue Stamps, RFC 282:5-6, 2004 Rare Cancellation of the First Issue, RFC 298:2-3, 2005 Way Bills in the Postal Service of the XIX Century, RFC 301:2-6, 2006 Cancellation "Buzonero", RFC 302:5-6, 2006 The oval cancellation "Admon. De Correos de Puntarenas", RFC 342:4-5, 2013 The cancellation "barrel" on the First Issue, RFC 351:5-7, 2014 Rare cancellation of Guanacaste, RFC 352:2-3, 2014

Cancellations Commemorative LACSA First Flights Commemorative Cachets, RFC 059:2, 1984 UNESCO Commemorative Cachet, RFC 113:1, 1990 Italy Championship Soccer Cup Issue Cancellation, RFC 115:6, 1990 Cancellation Commemorating Presidents Meeting, RFC 121:1, 1991 Spanish King Visit Cancellation, RFC 124:1, 1991 Civil Service Cancellation May 1991, RFC 127:4, 1991 Centenary of Mora and Canas Execution Covers, RFC 128:3-6, 1991 More About Mora and Canas Covers, RFC 132:2-3, 1991 Cancellation Opening of Limon Bay, RFC 137:2, 1992 Promotional and Commemorative Cancellations, RFC 137:3-6, 1992 Boy Scouts Cancellation, RFC 139:4, 1992 San Jose-Coco Island Mail, RFC 147:6, 1993 CR University Commemorative Cachet, RFC 148:6, 1993 San Ramon Branch University of Costa Rica Cancellation , RFC 148:6, 1993 Polska '93 Commemorative Cancellation, RFC 151:7, 1993 Social Rights Commemorative Cancellation, RFC 153:5, 1993 Bangkok '93 Cancellation, RFC 154:4-6, 1993 Cancellation for the VII Congress of Electric Rates, RFC 160:1, 1994 Commemorative Cancellation of ACI, RFC 177:6, 1995 Josemaria Escriva- Founder of Opus Dei, RFC 253:1, 2002 Puntarenas Commemorative Cancellation, RFC 256:1, 2002 Visit of F. Chang to CR, RFC 259:2-3, 2002 Cancellation Honoring Guillermo Marconi, RFC 262:5-6, 2002 National Day of Science and Technology Cancellation, RFC 272:4-5, 2003 75th Anniversary Raventos Theater, RFC 275:1, 2003 Espana 2004 Exhibition, RFC 281:1. 2004 Cancellation Antique Car Vehicles Convention 2004, RFC 282:6, 2004 EXPOFILA 2004 Cancellation on Postal Stationery , RFC 284:1, 2004 Pope Benedict Cancellation, RFC 294:1, 2005 List of Commemorative Cancellations for 2007, RFC 307:6, 2007 J.M. Escriva Cancellation, RFC 321:6, 2009

Catalogues First Update: Saenz Revenue Stamp Catalogue, RFC 045:3-4, 1983 Thoughts About a New Postal Catalogue, RFC 088:3-6, 1988 The 1907 Issue and Gibbons, RFC 121:5, 1991 Scott Catalogue Price Changes 1995, RFC 161:1-2, 1994 Prices in Scott 2000, RFC 235:1, 2000 Costa Rica Postal Catalogue 2004, RFC 286:1, 2004 Costa Rica Postal Catalogue 2014, RFC 364:1, 20145

Censored Mail Military Censor Mail in 1948 and 1955, RFC 246:3-6, 2001 Censored Mail, RFC 293:3-6, 2005 Adhesive Tape on Censored Mail, RFC 297:5-6, 2005

Christmas Tax Stamps Imperforated 1960 Christmas Tax Stamp, RFC 045:5-6, 1983 Plate Marking in 1970 Christmas Tax Stamp, RFC 049:4-5, 1984 Varieties of the 1971 Christmas Tax Stamps, RFC 052:2, 1984 Varieties of the 1965 Christmas Tax Stamp, RFC 053:3, 1984 Christmas Tax Stamp 1989, RFC 119:6, 1990 Christmas Tax Stamps 1990, RFC 122:4, 1991 Imperforate 1980 Christmas Tax Stamp, RFC 151:1, 1993 Christmas Tax Stamp of 1994, RFC 168:1, 1994 Perforation Varieties of the 1983 Christmas Tax Stamp, RFC 174:5, 1995 Perforation Varieties of the 1965 Blue Christmas Tax Stamp, RFC 175:2, 1995 Varieties on the 1970 Christmas Tax Stamp, RFC 176:6, 1995 Souvenir Sheet of the 1995 Christmas Tax Stamp, RFC 179:1-3, 1995 Essay of the Christmas Tax Stamp of 1959, RFC 180:1, 1995 Souvenir Sheets of the 1995 Christmas Tax Stamp and America UPAEP Issue, RFC 181:1-3, 1996 Perforation Errors of 1998 Christmas Tax Stamps, RFC 220:6, 1999 Error on 1965 Christmas Tax Stamp, RFC 228:2, 1999 Double Error in a 1972 Christmas Tax Stamp, RFC 231:6, 2000 Double Surcharge on the 1958 Christmas Tax Stamp, RFC 233:5, 2000 Horizontal Imperforate CT78 of 1978 Issue, RFC 236:1. 2000 Misprint of Stamps in P.O. Bulletin of 1979 Issue, RFC 238:1-2, 2000 Imperforate Block of 4 of Christmas Tax Stamp of 1994, RFC 241:1, 2001 Gutter Pairs in Tax Stamps of 1975 to 1980, RFC 245:2-4, 2001 Gutter Pairs in Tax Stamps of 1996, RFC 252:3, 20011996 Constant Varieties in Christmas Stamps of 1981, RFC 256:6, 2002 Constant Variety in Christmas Stamp of 1981, RFC 257:5, 2002 Constant Variety in Christmas Stamp of 1981, RFC 257:6, 2002 Constant Perforation Variety of 1980 Christmas Stamps, RFC 260:4, 2002 Constant Variety of 1973 Christmas Stamp, RFC 272:6, 2003 Tax Stamps Not Used in Bulk Mail, RFC 276:3. 2003 Broken Design on 2003 Christmas Stamp, RFC 278:3-4, 2004 A Variety of Christmas Stamps of 1978, RFC 285:2, 2004

Coco Island Coco Island Post Office Opening, RFC 004:3-8, 1979 Coco Island Official Issue, RFC 010:3-6, 1980 Cruiser "Portland" Visits Coco Island I, RFC 017:7-11, 1980 Coco Island Issue of 1936, RFC 136:3-6, 1992 Post Office in Coco Island, RFC 143:1-3, 1992 San Jose-Coco Island Mail, RFC 147:6, 1993 Cruiser "Portland" Visits Coco Island II, RFC 187:4-6, 1996 Coco Island Issues, RFC 192:4-6, 1996 Coco Island Issue of 1936: Study of Cancellations, RFC 280:3-5, 2004 Machine Cancellation in the 1936 Coco Island Issue, RFC 281:3, 2004

Covers Cover of 1892, RFC 007:2, 1980 Cover with the 1911 "Dos Centimos" Overprints, RFC 025:2, 1981 Cover with 1901 Stamps, RFC 026:5, 1982 Guanacaste Cover with G-13, RFC 083:2, 1987 Anatomy of a Registered Cover, RFC 086:2-3, 1988 Official Mail of 1905, RFC 087:3-6, 1988 Guanacaste Cover of 1888, RFC 088:1-2, 1988 Interesting Cover of the First Issue, RFC 094:3-4, 1988 Two Interesting Covers of the First Issue, RFC 101:2-3, 1989 Unknown Cover Reported by "Der Philatelist" in 1882, RFC 101:5-6, 1989 Coffee Propaganda Cachet in 1990 Coffee Issue, RFC 119:3, 1990 Illustration of Sc 51- 1C- on Cover, RFC 142:5, 1992 Illustration of Sc 47 on Cover with Unusual Cancellation, RFC 143:6, 1992 Important Registered Cover of June 6 1916, RFC 151:1-2, 1993 Interesting Franking with the 1892 Issue Stamps, RFC 163:4, 1994 Attractive Cover of the First Issue, RFC 231:1, 2000 A 1911 Interesting Cover, RFC 234:2-3, 2000 Cover with Dos Reales of 1877 in E-Bay, RFC 247:3, 2001 Consular Airmail with Receipt Notice, RFC 324:4, 2009 Un Centavo surcharge of 1911, RFC 343:1. 2014 Late Use of 1c of 1901, RFC 343:2, 2014 Combination of 110 + C40 in a 1940 Cover to Cuba, RFC 345:7, 2014 Consular Airmail with Receipt Notice, RFC 347:5-6, 2014 Revenue stamp of 1870 used as postage stamp in Esparza, RFC 351:1, 2014 Cover Posted with a Revenue Stamp of 1891, RFC 359:1, 2014 Wrapper Mailed in 1883, RFC 385:1-2, 2016 Late Use of 1c of 1901 Duplicate, RFC 398:3, 2017 Cover with Postage Due Stamp in 1927, RFC 403:1, 2018

Decrees and Laws Decree LXXXIX Regulates Postal Service in 1847, RFC 112:2-6, 1990 Revenue Stamp Authorizing Laws, RFC 131:5, 1991 Decrees Authorizing Discounts on Revenue Paper, RFC 138:2-6, 1992 Decree Authorizing the National Monument Revenue Stamp Design, RFC 163:5-6, 1994

Design in Stamps Design of New Postal Stamps, RFC 097:6, 1989 Design Faults in CR Stamps, RFC 111:2-6, 1990 Photograph for Stamp Sc 118, RFC 138:6, 1992 Two Issues with the Same Design (Sc 577-79), RFC 283:1, 2004 Children's Book by Carmen Lyra Issue (Sc 611), RFC 313:1, 2008 Artist's Drawing French Alliance Issue (Sc 282), RFC 399:2, 2017

Editorials-RFC RFC 001:1, 1979 RFC 021:1, 1981 RFC 200, RFC 200:1-2, 1997

Electoral Stamps Shifted Overprints in 1944 Electoral Stamps, RFC 117:1, 1990 Double Overprint on Electoral Stamp, RFC 225:5, 1999

Essays/Non Emis Non-Emis of 1923, RFC 010:2. 1980 Non-Emis of 1911, RFC 019:4-5, 1981 Essays of the First Issue, RFC 051:6, 1984 Notes on Non-Emis and Political Labels, RFC 059:5-6, 1984 Artist Design of Sc 279, RFC 098:2-6, 1989 Postage Due Non-Emis Stamps in 1921, RFC 112:1, 1990 Non-Emis Honoring Columbus in 1945, RFC 121:6, 1991 Non Emis Airmail Stamp of 1930, RFC 150:3, 1993 Non-Emis of the Juan Santamaria Centenary, RFC 155:6, 1993 Overprint "Café de Costa Rica" Essays, RFC 167:2-3, 1994 Essay of the Christmas Tax Stamp of 1959, RFC 180:1, 1995 Gabriela Mistral Essays, RFC 190:2, 1996 Gabriela Mistral Essays, RFC 191:1-3, 1996 Bishop Thiel Non Emis Stamp, RFC 204:4-6, 1997 Rio Grande and Sapoa Heroes Essays, RFC 205:2, 1998 National Flag Essays, RFC 206:2-5, 1998 Bishop Thiel Non Emis Stamp, RFC 216:1, 1998 Essays on Puntarenas Hospital Revenue Stamps of 1944, RFC 230:2-3, 2000 Essay of the Jesus Jimenez Issue of 1923, RFC 231:3-5, 2000 Essays for the Non Emis issue of 1907, RFC 237:2-3, 2000 Overprints for the V Postal Congress of the Americas and Spain (NE2-5), RFC 268:2-6, 2003 Non Emis (my first article), RFC 343:3-5, 2014 Bishop Thiel Non Emis Stamp (Duplicate), RFC 378:3-5, 2015 Non Approved Essays with Columbus Portrait (Minerva Printing), RFC 162:1, 1994

Exhibitions Costa Rica 80, RFC 002:1, 1979 First National Philatelic Exhibition, RFC 014:1-2, 1980 The First National Philatelic Exhibition, RFC 015:1, 1980 Costa Rica 80, RFC 015:4-10, 1980 Costa Rica 80, RFC 016:4-7, 1980 Costa Rica 80, RFC 016a:10-12, 1980 IX National Philatelic Exhibition, RFC 039:1-2, 1983 Brasiliana 83, RFC 043:6, 1983 Argentina 86, RFC 067:1, 1985 Finlandia 88, RFC 083:3, 1987 CR Collections in Finlandia 88, RFC 084:1, 1987 EXFIVIA 87, RFC 087:1, 1988 FIP Judges, RFC 089:1, 1988 Espamer 91, RFC 119:1, 1990 Postal Museum Exhibition (Oct-Nov 1990), RFC 125:1-2, 1991 XII CR Philatelic Exhibition-1990, RFC 126:1, 1991 EXFILCORI 91 (XII Philatelic Exhibition), RFC 129:5-6, 1991 Granada 92, RFC 135:1, 1992 Granada 92 Comments, RFC 138:1, 1992 Granada 92 Comments, RFC 139:1-2, 1992 Philatelic Exhibit Commemorating Columbus Day, RFC 140:2, 1992 Brasiliana 93, RFC 147:1, 1993 Polska 93, RFC 147:1, 1993 Costa Rica '93, RFC 152:6, 1993 Brasiliana '93, RFC 153:1, 1993 Bangkok '93, RFC 154:4-6, 1993 PhilaKorea 1994, RFC 166:1, 1994 Singapore '95, RFC 175:1, 1995 CAPEX '96, RFC 186:2-5, 1996 "Espamer" and "Aviacion y Espacio" '96 (Sevilla), RFC 187:1-3, 1996 First Hispano-Costa Rican Philatelic Exhibit, RFC 188:1-2, 1996 XIII National and I Hispano-Costa Rican Philatelic Exhibit, RFC 189:1-6, 1996 Istambul '96, RFC 191:4-6, 1996 Pacific '97, RFC 198:2, 1997 FIP Exhibits 1997-2006, RFC 198:6, 1997 Costa Rica '97, RFC 202:1-5, 1997 Costa Rica '97, RFC 203:2-4, 1997 Moscow '97, RFC 204:1, 1997 Philately Promotion and Mophila Class, RFC 205:3-6, 1998 Indepex '97, RFC 206:1, 1998 EXFILHON '98, RFC 208:1, 1998 Second Hispanic-Costa Rican Exhibit, RFC 209:1, 1998 Modern Philately and Speculative Issues, RFC 209:2-9, 1998 EXPHILHON '98, RFC 212:1, 1998 Espamer '98, RFC 215:1-2, 1998 Thoughts on Commissioners and Juries, RFC 219:1-4, 1999 F.R. Mayer Collection: "Costa Rica 1797-1883", RFC 219:5-6, 1999 IBRA '99, RFC 220:1-2, 1999 Second Hispanic-Costa Rican Exhibit, RFC 222:1-2, 1999 PhilexFrance '99, RFC 223:1, 1999 Costa Rica '99, RFC 225:1, 1999 Costa Rica '99, RFC 226:1-2, 1999 London 2000, RFC 235:2-3, 2000 CR Exhibit in PHILEXFRANCE 99, RFC 240:2-6, 2000 III Exposicion Filatelica Hispano Costarricense, RFC 247:1, 2001 Belgium 2001, RFC 247:7, 2001 Proposed Central America Philatelic Exhibit , RFC 260:3, 2002 IV Hispano American Philatelic Exhibition, RFC 267:1, 2003 V Hispano Costa Rica Exhibit, RFC 295:5, 2005 EXPOFILA 2007, RFC 307:1, 2007 Naming of Philatelic Exhibition for Fred O'Neill, RFC 310:1, 2007 EXPOFILA 2008, RFC 315:5-6, 2008 Costa Rica in EXFILHON 2008, RFC 316:1, 2008 EXPOFILA 2009, RFC 324:1, 5-6, 2009 The XVII National Philatelic Exhibition, RFC 327:1-2, 2010 INDIPEX 2011, RFC 330:6, 2011 One Hundred Years of Aviation, RFC 331:1-2, 2011 AFCR 80th. Anniversary Exhibit in Liberia, RFC 334:1, 2012 AFCR 80th. Anniversary Exhibit in Puntarenas, RFC 335:1, 2012 Exhibition 150 Anniversary First Issue 2013, RFC 339:1, 2013 Exhibition 150 Anniversary First Issue 2013, RFC 341:1-4, 2013 Brasiliana 2013, RFC 342:1,2013 Exphil125, RFC 352:1, 2014 ExpoFila 2014 San Jose, RFC 356:1-3, 2014 Fin del Mundo- Argentine, RFC 365:1, 2015 EXPO Filatelia 75 UCR, RFC 373:5-6, 2015 EXPO Filatelia 75 UCR Palmares, RFC 376:4-7, 2015 EXPO Filatelia 75 UCR Palmares (Duplicate), RFC 378:1-2, 2015 Exhibit 120 Anniversary of UCR School Plastic Arts, RFC 391:1, 2016 Exhibit 120 Anniversary of UCR School Plastic Arts, RFC 392:1, 2016 Exhibit 120 Anniversary of UCR School Plastic Arts, RFC 397:1, 2017 Exhibit Centenary Post Office Building San Jose, RFC 400:1-2, 2017

Fantasies Fantasy Overprint: 1881-2, RFC 029:2, 1982 1920 Fantasy Overprints, RFC 046:6-7, 1983 "Almirante" Fantasy Overprint Part I, RFC 058:5-8, 1984 "Almirante" Fantasy Overprint Part II, RFC 061:2-6, 1985 Fantasies "Puerto Cristobal Colon", RFC 131:4, 1991 Fantasy (Forgery) of the Un Peso of the First Issue, RFC 165:4-6, 1994 Fantasies of Limon - 1929, RFC 181:6, 1996

First Day Covers FDC of the 1935 Virgin of the Angels Issue, RFC 021:6, 1981 1940 FDC of the Philatelic Office, RFC 058:4-5, 1984 FDC II National Philatelic Exhibition, RFC 105:5-6, 1989 FDC First Postage Stamp Issue, RFC 120:1, 1990 Coco Island Issue of 1992, RFC 147:6, 1993 Bishop Sanabria Issue and Commemorative Covers, RFC 227:1, 1999 R.A. Calderon Birthday Anniversary Issue, RFC 238:5-6, 2000 FDC Covers Used for Promotion, RFC 243:5-6, 2001 FDC of the "Wing" issue of 192 (Sc C14), RFC 274:2-3, 2003

First Issue Illustration of Scott 3, RFC 001:3, 1979 Special Use of the Medio Real, RFC 002:5-6, 1979 Cancellations on the First Issue, RFC 003:2, 1979 Cancellations on the First Issue, RFC 016a:1-9, 1980 Circulation Dates of the Medio and Dos Reales Stamps, RFC 017:11, 1980 Cancellations on the First Issue, RFC 017:3-6, 1980 "Un Peso" Interesting Stamps, RFC 021:4-5, 1981 Surcharges on the First Issue I, RFC 025:3-101981 Last Day of Use for the Medio Real, RFC 029:6, 1982 Postal Use of the Second Plate of the Medio Real, RFC 038:6-11, 1983 Postage Due Markings on the First Issue, RFC 039:5-7, 1983 Perforations of the 1863 Issue I, RFC 040:4-8, 1983 Perforations of the 1863 Issue II, RFC 041:2-5, 1983 Postage Due Markings on the First Issue, RFC 041:6-7, 1983 Dates on First Issue Covers, RFC 043:1, 1983 Cancellations on the First Issue, RFC 045:2, 1983 Essays of the First Issue, RFC 051:6, 1984 First Issue Proofs, RFC 053:2, 1984 First Issue Interesting Cancellation, RFC 058:2, 1984 Salesman Samples of the First Issue, RFC 064:6-7, 1985 Double Impression on Sc 1, RFC 065:1, 1985 Surcharges on the First Issue II, RFC 067:2-6, 1985 Surcharges on the First Issue III, RFC 068:2-6,1985 Surcharges on the First Issue, RFC 069:1, 1985 Interesting Cover of the First Issue, RFC 094:3-4, 1988 First Issue 125st. Anniversary, RFC 096:1, 1988 Two Interesting Covers of the First Issue, RFC 101:2-3, 1989 First Issue Stamps Used in Combination with British Stamps, RFC 119:4-5, 1990 Unknown Postal Marking on the First Issue, RFC 123:2-3, 1991 Postal Service Organization and Authorization of 1863 Stamps, RFC 126:4-6, 1991 Complete Sheet of 4 Reales, RFC 143:4-5, 1992 Illustration of a Block of 25 of Un Peso First Issue, RFC 144:3, 1992 Plate Varieties of Un Peso First Issue, RFC 148:6, 1993 Public Sale of First Issue Stamps, RFC 150:1-2, 1993 Cuatro Reales Plate Varieties I, RFC 150:4-6, 1993 Cuatro Reales Plate Varieties II, RFC 151:3-7, 1993 Perforation Error of Medio Real Second Plate of First Issue, RFC 156:1, 1993 Letter in a First Issue Cover, RFC 157:2-4, 1994 Perforation Error of Medio Real Second Plate of First Issue, RFC 158:2-3, 1994 Fantasy (Forgery) of the Un Peso of the First Issue, RFC 165:4-6, 1994 Rhomboid Cancellation on the First Issue, RFC 210:2-3, 1998 Surcharges on First Issue, RFC 211:5, 1998 The Longest Postal Marking on the First Issue, RFC 214:4-5, 1998 Double Perforation in the First Issue, RFC 222:3-4, 1999 Double Entry on Sc 3, RFC 223:2-4, 1999 Cancellation "S Mateo", RFC 225:2-4, 1999 Attractive Cover of the First Issue, RFC 231:1, 2000 A Document of the First Issue, RFC 233:2-4, 2000 Cover with Dos Reales of 1877 in E-Bay, RFC 247:3, 2001 Puntarenas Use of First Issue Stamps, RFC 247:5-6, 2001 International Postal Service During the First Issue, RFC 258:4-6, 2002 Rhomboid Cancellation on the First Issue, RFC 277:3-6, 2004 Imperforate Error of the Medio Real Second Plate, RFC 296:6, 2005 Rare Cancellation of the First Issue, RFC 298:2-3, 2005 Digital Marks on Surcharges of the First Issue, RFC 300:2, 2005 Marking "Administr. Gral. Correos de Costa Rica" in the First Issue, RFC 303:2-4, 2006 Dos Reales Proof with Red Specimen Overprint, RFC 307:2, 2007 Imperforates of Medio and Dos Reales , RFC 314:3-5, 2008 Restoration of Covers of the First Issue, RFC 330:1-5, 2011 Documents related to the First Issue, RFC 338:1-5, 2012 Supply of First Issue Stamps in Puntarenas in 1865, RFC 340:1-5, 2013 Half Real Second Plate, RFC 341:5-8, 2013 The cancellation "barrel" on the First Issue, RFC 351:5-7, 2014 Specimen Proofs of Dos Reales stamp, RFC 359:6, 2014 Foreign Mail Management of the First Issue, RFC 365:4-6, 2015 Broken Specimen Legend in 2 Reales Imperforated, RFC 381:1, 2016 Medio Real Plate 2 Imperforate? RFC 398:1-2, 2011

Forgeries Inverted Surcharges on 1947 Soccer Issue, RFC 008:4-6, 1980 Forgeries on Inverted Overprints 1923 Official Issue, RFC 063:6, 1985 Type G-3 in Guanacaste Overprints, RFC 100:3-4, 1989 Coffee Overprints and its Forgeries, RFC 140:3, 141:2, 1992 Forgery of 1932 Provisional Overprint C3, RFC 163:1, 1994 Fantasy (Forgery) of the Un Peso of the First Issue, RFC 165:4-6, 1994 Official Overprint 1923 Forgeries, RFC 266:3-6, 2003 Overprint Lindbergh and Forgeries, RFC 339:2-6, 2013 Forgeries of 1941 surcharges, RFC 353:1, 2014

Geography CR Transportation Ways in 1854, RFC 102:2-4, 1989 CR First Territorial Division, RFC 114:4-5, 1990 First CR Territorial Division Duplicate, RFC 292:3-4, 2005 Town "La Bomba" in the Postal Service, RFC 319:2-6, 2009 Peralta in the Postal Service I, RFC 321:2-5, 2009 Peralta in the Postal Service II, RFC 322:2-3, 2009 Peralta in the Postal Service III, RFC 323:2-4, 2009 First CR Territorial Division Duplicate, RFC 383:3-4, 2016

Guanacaste Forgeries of Type G-13, RFC 001:2, 1979 Type G-13 Guanacaste Overprint, RFC 005:2-4, 1979 The G(n)anacaste Error, RFC 028:6-7, 1982 Constant Varieties of Type G-9 Guanacaste Overprint, RFC 029:3-5, 1982 1884 Revenue Guanacaste Revenue Pair Postal Used in 1888, RFC 049:3, 1984 Guanacaste Double Overprints, RFC 062:3-5, 1985 Minor Varieties in Guanacaste Plate G-1, RFC 063:3-6, 1985 Varieties of Guanacaste Overprints G56-59, RFC 064:1-2, 1985 File Sheets of Guanacaste Sc 64 and 65, RFC 064:3-5, 1985 Errors and Varieties in Guanacaste Overprints, RFC 080:2-6, 1986 Guanacaste Cover with G-13, RFC 083:2, 1987 Guanacaste Cancellations, RFC 084:4-6, 1987 Guanacaste Cover of 1888, RFC 088:1-2, 1988 Type G-3 in Guanacaste Overprints, RFC 100:3-4, 1989 Guanacaste Overprints on Revenue Stamps, RFC 125:3-4, 1991 Notes on "Guanacaste-Correos" Overprint, RFC 146:2-6, 1993 More Information on the "Guanacaste-Correos" Overprint, RFC 162:2-6, 1994 "Guanacaste" Postal Markings, RFC 166:2-6, 1994 Guanacaste Overprint G8, RFC 175:3-4, 1995 "Guaganaste" Overprint in a Remainder Stamp, RFC 177:1-3, 1995 Details of Guanacaste Overprint G3 and G4, RFC 179:4-5, 1995 History of the First Guanacaste Overprint, RFC 180:2-9, 1995 "Guagacaste" Error in Plate VII, RFC 194:4-5, 1997 Inverted Guanacaste in Plate I, RFC 195:2-4, 1997 Inverted Guanacaste in Plate I, RFC 196:4-5, 1997 Guanacaste Stamps of Plate I (Vertical), RFC 208:6, 1998 Varieties of Guanacaste Plate III (G1), RFC 227:3-6, 1999 1 and 2 Cents Stamps Plate 1, RFC 272:2-3, 20003 Captain H.R. Oldfield, RFC 278:5-6, 2004 Seldom Known Cancellation of Guanacaste, RFC 282:2-4, 2004 Type G2 Guanacaste Revenue Stamps Use, RFC 286:2-4, 2004 Guanacaste Pre Stamp Postal Markings, RFC 287:3-6, 2004 Collecting Postal Used Guanacaste Stamps, RFC 304:1-3, 2006 Plate VI of the Guanacaste Surcharges First Part, RFC 333:2-9, 2012 Plate VI of the Guanacaste Surcharges Second Part, RFC 334:2-5, 2012 Plate VI of the Guanacaste Surcharges Third Part, RFC 335:4-6, 2012 Double Overprint of the Vertical OP plate, RFC 337:1-5, 2012 "Guanacaste-Correos" overprints, RFC 345:1-6, 2014 Guanacaste Revenue Stamps of 1883, RFC 347:2-4, 2014 Rare cancellation of Guanacaste, RFC 352:2-3, 2014 Pre-stamp Cancellations of Guanacaste, RFC 353:3-6, 2014 The Vertical Overprints, RFC 358:2-3, 2014 Captain H.R. Oldfield Duplicate, RFC 360:5-6, 2015 The G(n)anacaste Error, RFC 361:1, 2015 Revenue Paper Discount for Guanacaste in 1885 Duplicate, RFC 362:2-4, 2015 Guanacaste Overprints Plate VI, RFC 368:4-6, 2015 Revenue Stamps and Legal Paper overprinted Guanacaste 1885 to 1892, RFC 379:2-4, 2015 Revenue Paper Discount for Guanacaste in 1885 Duplicate, RFC 393:2-6, 2017

History The City of Cartago in 1853, RFC 030:1-2, 1982 Illustration of a Historical Curiosity (Continental Defense Issue), RFC 033:2, 1983 CR Population in 1820, RFC 066:2, 1985 CR Participation in the 1892 Chicago Exhibition, RFC 073:2-5, 1986 Background on the Nobel Prize Issue, RFC 089:2-6, 1988 CR University in the National Philately Part I, RFC 090:2-5, 1988 CR University in the National Philately Part II, RFC 092:4-6, 1988 British Consul Wallis Letters from CR in 1854, RFC 096:2-6, 1988 Punta Arenas Port in 1855, RFC 097:4-5, 1989 Our Lady of the Angels Church in 1858, RFC 104:2, 1989 University of CR and its Relationship to Philately, RFC 118:4-6, 1990 CR Population in 1844 and 1864, RFC 120:2-4, 1990 Village of Esparza in 1858, RFC 121:2-3, 1991 List of CR Presidents, RFC 122:5-6, 1991 Costa Rica in 1829, RFC 145:5-6, 1993 How Would Have Been the 1901 Issue, RFC 154:2-3, 1993 Letter in a First Issue Cover, RFC 157:2-4, 1994 Holidays in the Braulio Carrillo Administration, RFC 167:4-5, 1994 The Church of The Virgin of the Angels, RFC 226:4-5, 1999 City of Heredia in 1853 According with M. Wagner and C. Scherzer, RFC 230:4-6, 2000 Bernardo Soto and the CR Railroads, RFC 234:4-7, 2000 Bernardo Soto and the CR Railroads II, RFC 235:4-6, 2000 1862 Moin Port Report, RFC 28:1-3, 1982 Mariano Montealegre and the Postal Service II, RFC 325:1, 2010 Honoring Juan Rafael Mora, RFC 350:1-2, 2014 Honoring Juan Rafael Mora, RFC 354:1, 2014 Captain H.R. Oldfield, RFC 360:5-6, 2015

Imperforates Imperforated Modern Issues-late '70, RFC 020:4-6, 21:2-3, 1981 Imperforated 1901 5c, RFC 028:5, 1982 Postal Use of the 1907 Imperforates, RFC 040:1-3, 1983 Imperforated 1960 Christmas Tax Stamp, RFC 045:5-6, 1983 Imperforated Stamps 1976 Special Delivery Issue, RFC 066:1. 1985 Postal Use of the 1907 Imperforates, RFC 071:2-3, 1985 Imperforate 1980 Christmas Tax Stamp, RFC 151:1, 1993 Imperforate 1980 Christmas Tax Stamp, RFC 230:1, 2000 Imperforate Block of 4 of Christmas Tax Stamp of 1994, RFC 241:1, 2001 Imperforate Postage Stamps in the Central Bank, RFC 257:2, 2002 Imperforate Postage Stamps in the Central Bank, RFC 264:1, 2002 Imperforate Proofs Justo Facio Issue (Sc 261) , RFC 277:2, 2004 Imperforate of 1946 Reimpression of 1901 Issue, RFC 304:4-5, 2006 Imperforate Strip of Aqueducts Issue (Sc 493), RFC 307:5, 2007 Imperforate America Issue 1995 (Sc 485, 488), RFC 308:5-6, 2007 Imperforates of Medio and Dos Reales , RFC 314:3-5, 2008 Imperforate Triptych of the Entrance of the Saints Issue (Sc 496), RFC 315:3-4, 2008 Imperforate of the America Issue 1996 (Sc 494-5), RFC 318:2, 2008 Imperforate Gutter Pairs of Aqueducts Issue (Sc 493), RFC 319:1, 2009

Markets Mark Hass Collection Sold, RFC 004:1, 1979 CR Stamps in International Markets, RFC 012:1, 1980 Price for CR Stamps, RFC 023:1, 1981 Price of CR Covers, RFC 090:6, 1988 EBay Price for Soccer Championship Issue 2002, RFC 260:1. 2002 Speculation of Recent Souvenir Sheets (2016), RFC 389:1-2, 2016

Maxiphilately CORTEL Philatelic Documents 1980-81, RFC 261:5-6, 2002 More Philatelic Documents 1980-82, RFC 265:2-3, 2003 Pope John Paul Death Commemoration, RFC 292:5-6, 2005

Miscellaneous Illustration of Tete Beche (Saenz 216f), RFC 042:2, 1983 Issue Commemorating Two Events, RFC 084:2-3, 1987 Gutters Pairs of Queen Isabella Issue, RFC 224:4-6, 1999 Two Printings of the Sidney Olympics Issue 2000, RFC 242:2-3, 2001 The Two Plates of the Industries Issue, RFC 263:2-3, 2002 Sheets of 110 Stamps in Soccer Championship Issue 1998, RFC 287:1-2, 2004 Gutter Pair in the LACSA Issue of 1996, RFC 300:5, 2005

New Issues Rowland Hill Issue, RFC 004:9, 1979 Costa Rica 80, RFC 006:1, 1979 Ex-presidents Issue, RFC 007:4-5, 1980 Human Rights Congress Issue, RFC 038:3, 1983 Telecommunications Issue, RFC 038:3, 1983 Surcharges on St. Francis de Assisi Issue, RFC 044:1, 1983 New Issues for 1984, RFC 050:1-2, 1984 Supreme Court Presidents Issue Misfortunes, RFC 074:1-4, 1986 Soccer Cup Philatelic and Regular Issue, RFC 076:1-3, 1986 Supreme Court Presidents Issue Misfortune Explanations, RFC 079:1-4, 1986 Airmail Stamps Again in CR, RFC 093:1, 1988 Spelling Error in New Issue (not issued), RFC 094:1-2, 1988 High Values in New Issues, RFC 104:1, 1989 New Issues for 1990, RFC 116:2, 1990 New Issues for 1991, RFC 128:1-2, 1991 Surcharges Issue 1991, RFC 130:6, 1991 Supreme Court Presidents Issue 6 Years Later, RFC 134:1, 1992 Coco Island Issue of 1992, RFC 147:6, 1993 Geographic Institute Issue (3/25/93), RFC 148:1, 1993 Surcharge on M.A. Castro Carazo Issue, RFC 178:1, 1995 Supreme Electoral Board Issue, RFC 228:1, 1999 1999 Issues- A Central Bank Report, RFC 231:2, 2000 Postage Stamp Projects for 2001, RFC 242:4, 2001 New Issues for 2002, RFC 249:1, 2001 Twin Towers Terrorist Attack Issue, RFC 250:4-6, 2001 New Issues for 2002, RFC 251:1, 2001 New Issues for 2002, RFC 255:1, 2002 Centenary of Limon Issue, RFC 259:4-5, 2002 Twin Towers Attack September 11 Issue, RFC 260:6, 2002 New Issues for 2003, RFC 264:5, 2002 New Issues for 2003, RFC 269:1, 2003 Modified List of New Issues for 2003, RFC 270:6, 2003 Space Exploration (Sc 565), RFC 271:6, 2003 Dates of Postal Celebration in 2004, RFC 273:2, 2003 New Issues for 2004, RFC 276:1, 2003 Stamp Issue Program for 2005, RFC 288:4, 2004 Second Issue of the Volcanoes (Sc 577-79) 2005, RFC 298:1, 2005 Stamp Issue Program for 2005, RFC 298:2, 2005 150th Anniversary of War Against Walker, RFC 300:1, 2005 New Issues for 2007, RFC 306:1, 2007 New Issues for 2009, RFC 320 1, 2009

Obituaries Salvador Jimenez Canossa, RFC 080:1, 1986 Alex A. Cohen, RFC 088:6, 1988 Alvaro Bonilla Lara, RFC 091:1, 1988 Ricardo Fournier Vargas, RFC 099:1-2, 1989 Dr. Carlos Saenz Mata, RFC 141:1, 1992 Roman Macaya, RFC 145:2, 1993 Antonio Castellano, RFC 195:1, 1997 William Reuben 1922-2000, RFC 236:7, 2000 Jose Antonio Hernan Seijas, RFC 245:1, 2001 Fernando Aviles Chaves, RFC 261:4, 2002 Ricardo Alvarez, RFC 270:1, 2003 Leo J. Harris, RFC 395:1, 2017

Official Mail Official Free Franking Markings, RFC 131:2-4, 1991 Used of Perforated Official Air Mail Stamps, RFC 325:2-7, 2010 Use of Official Stamps in Private Mail 1931, RFC 326:2, 2010 Registered Official Letter from Alajuela, RFC 343:6, 2014 Registered Official Mail between 1862 and 1882, RFC 391:2-6, 2016

Official Postage Mirror Image on the Back of the 20c Official (O68), RFC 014:3, 1980 Official Stamps Types 2 and 3, RFC 033:3-6, 1983 The Rarest CR Cover (O5 & O17), RFC 034:1-2, 1983 The 15c Official Surcharge of 1920, RFC 042:4-6, 1983 The 1937 Official Issue, RFC 052:3-9, 1984 Official Issue of 1926, RFC 053:5-7, 1984 Airmails Perforated by Error for Official Use, RFC 062:5-6, 1985 Forgeries on Inverted Overprints 1923 Official Issue, RFC 063:6, 1985 Back Impression on Official Seals, RFC 077:1, 1986 Double Perforation on the 1923 Official Stamps, RFC 082:4, 1987 Plate Varieties 1908 Officials Overprints, RFC 115:4-5, 1990 Official Postal Marking of 1868, RFC 119:2, 1990 Official Marking of 1858, RFC 130:1, 1991 Double Overprint of Official of 1908 (O50), RFC 261:2, 2002 Official Overprint 1923 Forgeries, RFC 266:3-6, 2003 Provisorio Official of 1903, RFC 289:3-6, 2005 Used of Perforated Official Air Mail Stamps, RFC 372:2-8, 2015 Official Overprint on Coco Island 5 cents 1936, RFC 373: 4, 2015 Official Provisorio of 1903, RFC 374:2-6, 2015 Free Franking of Banco Internacional de CR 1936, RFC 385:6, 2016

Overprints/Surcharges Third Plate of 5c Overprint (Sc 82), RFC 042:2-3, 1983 Surcharges Issue 1991, RFC 130:6, 1991 Forgery of 1932 Provisional Overprint C3, RFC 163:1, 1994 Overprint 50 cts. On the 1978 Orchid Issue, RFC 175:5-6, 1995 Surcharges on First Issue, RFC 211:5, 1998 Damaged Surcharge "Correo Aereo" of 1930, RFC 229:5-6, 2000 Emergency Surcharges of 2001, RFC 249:1, 2001 Poorly Printed 65C Surcharge on Patriotic Stamp (546), RFC 253:2, 2002 1932 Surcharge on Telegraph Stamps (C3), RFC 346:2-5, 2014

Panama Sovereign State of Panama: Mail Beginnings, RFC 237:4-6, 2000 Panama Agency in the Postal Service XIX Century, RFC 329:4-6, 2011 Panama Agency in the Postal Service XIX Century Duplicate, RFC 352:4-6, 2014 Ship Wrecking Cover from Panama Recovered in1892, RFC 355:2. 2014 Panama Agency in the Postal Service XIX Century Duplicate, RFC 395:4-6, 2017

Perforations Perforations, RFC 024:1. 1981 Perforation Guides of 1901 Issue, RFC 126:2-3, 1991 Perforation Guides of 1903 Issue, RFC 127:1-2, 1991

Philatelic Organizations SIEF Foundation, RFC 003:1, 1979 Sociedad Filatelica de CR 1932, RFC 020:1, 1981 FIF, RFC 020:3, 1981 AFCR Board of Directors- 1984, RFC 047:1, 1984 AFCR News, RFC 050:2, 1984 AFCR Board of Directors- 1985, RFC 060:1, 1985 AFCR Headquarters Proposal, RFC 060:3, 1985 FIF Board of Directors 88-89, RFC 082:1, 1987 AFCR Board of Directors- 1989, RFC 097:1, 1989 AFCR Board of Directors- 1990, RFC 109:1, 1990 FIP 59th Congress- Report, RFC 115:1-2, 1990 AFCR Board of Directors- 1991, RFC 121:6, 1991 AFCR Board of Directors- 1992, RFC 133:1, 1992 60th Anniversary of the AFCR Predecessors, RFC 144:1-2, 1992 AFCR Board of Directors- 1993, RFC 145:1, 1993 AFCR Board of Directors- 1995, RFC 169:1, 1995 AFCR Board of Directors- 1996, RFC 181:1, 1996 AFCR Board of Directors- 1997, RFC 193:1, 1997 FIAF Board of Directors 1998-9, RFC 198:5, 1997 AFCR Board of Directors- 1998, RFC 205:1, 1998 AFCR 40 Year Anniversary and History, RFC 213:1-2, 1998 AFCR Status, RFC 229:1-4, 2000 AFCR Status, RFC 232:4-6, 2000 A "Tax" on International Exhibits Proposal, RFC 243:3-4, 2001 Board Election Asociacion Timbres Fiscales y Correo de CR, RFC 246:1, 2001 Board Election Asociacion Timbres Fiscales y Correo de CR, RFC 247:2, 2001 Academia Costarricense de Filatelia, RFC 248:1, 2001 FENCORI Organization Chart, RFC 294:6, 2005 O'Neill Named Honorary Member CR Revenue & Postage Society, RFC 303:1, 2006 AFCR Joins FENCORI Organization, RFC 312:1, 2008 FENCORI, RFC 326:1, 2010

Philatelic Publications "CR Philatelic Index Part II", RFC 054:3, 1984 "Era de Oro de la Filatelia Costarricense" by Carlos Saenz, RFC 057:1, 1984 "Postal Stationary Catalogue" by Carlos Saenz, RFC 058:1, 1984 Repertorio Filatelico History, RFC 100:1-2, 1989 "CR the 1901 Issue" by Ricardo Alvarez, RFC 132:1, 1991 RFC Cumulative Index Issue 1-150, RFC 164:1, 1994 "Costa Rican Postal Catalogue 1994": a Review, RFC 167:1, 1994 "Costa Rican Postal Catalogue": a Review, RFC 176:1, 1995 "History of the Revenue Stamps of Costa Rica": a Review, RFC 183:2, 1996 "Costa Rica Postal Catalogue 1997": a Review, RFC 198:1, 1997 Philatelic Literature and a Select Bibliography by Manfred Amrhein, RFC 199:1, 1997 "Costa Rica Postal Stationary": a Review, RFC 214:1, 1998 "Costa Rica Revenue Stamp Catalogue": a Review, RFC 214:1, 1998 "Airmail Postal History of Costa Rica": a Review, RFC 224:1, 1999 Repertorio Filatelico No 250 Issue, RFC 250:1, 2001 Repertorio Filatelico 25th Anniversary, RFC 272:1, 2003 "Costa Rica: Centenary First Issue Third Edition", RFC 273:1, 2003 "Centenary of the First Issue" by F. O'Neill, RFC 314:3-5, 2008 RFC Digital Publication, RFC 332:1, 2011 Revenue Stamps of 1884-88 used as Postage, RFC 346:1, 2014 Extracts from the Arthur K.M. Woo Collection by B. Moorhose- A Review I, RFC 377:1-4, 2015 Extracts from the Arthur K.M. Woo Collection by B. Moorhose- A Review II, RFC 380:1-3, 2016

Philatelists Fred O'Neill: 50 Years as Philatelist, RFC 236:2-3, 2000 Ricardo Alvarez 90th Birthday, RFC 263:1, 2002 Captain H.R. Oldfield, RFC 278:5-6, 2004 Ricardo Alvarez, RFC 315:1, 2008 Honoring F. O'Neil FENCORI President, RFC 349:1, 2014

Philately General Philatelic Terminology, RFC 007:1, 1980 How Postage Stamps Were Invented, RFC 008:1-3, 1980 First Postage Stamps, RFC 009:1, 1980 One Million Postage Stamp, RFC 010:1, 1980 How to Organize a Stamp Collection, RFC 011:1, 1980 Philatelic Terminology, RFC 013:1, 1980 First Postage Stamp Used, RFC 016:1, 1980 Arthur Hind Collection, RFC 019:1, 1981 Fungal Stains on Stamps, RFC 049:6, 1984 Modern Stamps Importance, RFC 129:1-2, 1991 Controversial Matter on Postal Issuance, RFC 170:2-6, 1995 Philatelic Language, RFC 193:2-5, 1997 Columbus' Caravels, RFC 196:1-3, 1997 International Symposium Postal Art, RFC 271:1, 2003 Philately in the University Programs, RFC 298:2, 2005

Philately General-Costa Rica Remembrances, RFC 020:5, 1981 "La Perseguidora del Punto", RFC 035:5, 1983 Collecting Stamps in XIX Century CR, RFC 101:1, 1989 Speculative Issues in Costa Rica, RFC 181:4-5, 1996 Speculative Issues, The Philatelic Board and L.F. Diaz, RFC 182:1-4, 1996 Speculative Issues in Costa Rica, RFC 183:1-2, 1996 Speculative Issues in Costa Rica, RFC 184:1-3, 1996 Collecting Costa Rica Stamps in the World, RFC 197:2-3, 1997 Orthography in Costa Rica Stamps, RFC 208:2-4, 1998 Restoration of Covers of the First Issue, RFC 330:1-5, 2011

Post Cards Independence Centenary Post Card, RFC 190:3-4, 1996

Postage Dues Use of Postage Due Stamps, RFC 016:2-3, 1980 Postage Due Markings, RFC 036:2, 1983 Postage Due Markings on the First Issue, RFC 039:5-7, 1983 Postage Due Markings on the First Issue, RFC 041:6-7, 1983 Postage Due Stamps, RFC 109:2-6, 1990 Postage Due Non-Emis Stamps in 1921, RFC 112:1, 1990

Postal History Special Use of the Medio Real, RFC 002:5-6, 1979 Last Day of Use for the Medio Real First Issue, RFC 029:6, 1982 "Roman Numerals" on Cover (82c), RFC 033:1, 1983 The Rarest CR Cover (O5 & O17), RFC 034:1-2, 1983 Fined 1889 Soto Cover, RFC 035:1, 1983 Uncommon Use of 1905 Overprint "Un Centimo", RFC 049:1-2, 1984 1884 Revenue Guanacaste Revenue Pair Postal Used in 1888, RFC 049:3, 1984 Postal Use of the 1901 20c Stamp, RFC 056:4-7, 1984 Postal History Documents, RFC 057:3, 1984 First Issue Stamps Used in Combination with British Stamps, RFC 119:4-5, 1990 Postal Used of High Values of Soto Issue of 1889, RFC 201:1-4, 1997 Correspondence of H. Geisenhof, RFC 206:6, 1998 Postal History Document 1868, RFC 259:6, 2002 Postal Use of the 1925 Surcharges (Sc 136-39), RFC 271:2-4, 2003 Postal History Document a 1873 Telegram, RFC 275:2-3, 2003 Late Use of the Patron Saint Issue of 1935, RFC 308:3-4, 2007 1907 Issue in the Local Registered Mail, RFC 316:4-6, 2008 Town "La Bomba" in the Postal Service, RFC 319:2-6, 2009 Peralta in the Postal Service, RFC 321:2-5, 2009 Peralta in the Postal Service II, RFC 322:2-3, 2009 Peralta in the Postal Service III, RFC 323:2-4, 2009 Postal Service of the Atlantic Railroad, RFC 328:1-6, 2011 Panama Agency in the Postal Service XIX Century, RFC 329:4-6, 2011 Documents related to the First Issue, RFC 338:1-5, 2012 Letter from from Villa Vieja 1788 , RFC 374:1, 2015 Late Use of the Patron Saint Issue of 1935 Duplication, RFC 379:5-6, 2015 Panama Agency in the Postal Service XIX Century Duplicate, RFC 395:4-6, 2017

Postal Markings Official Marking of 1858, RFC 130:1, 1991 Postal Marking "Franqueado Guanacaste", RFC 026:1, 1982 Circled "Franca" Postal Marking, RFC 032:1, 1983 Postage Due Markings, RFC 036:2, 1983 The "Esparza" Postal Marking, RFC 037:1, 1983 Postage Due Markings on the First Issue, RFC 039:5-7, 1983 Postage Due Markings on the First Issue, RFC 041:6-7, 1983 The "1" Postal Marking in the Prestamp Period, RFC 042:1, 1983 Transit Company Postal Markings, RFC 046:2-6, 1983 Ship Postal Markings, RFC 074:5-6, 1986 CR Postal Markings 1938-51, RFC 075:2-5, 1986 "Cartago" 1821 Marking, RFC 105:4, 1989 Free Franking Markings in 1863-1882, RFC 108:2, 1989 Official Postal Marking of 1868, RFC 119:2, 1990 Unknown Postal Marking on the First Issue, RFC 123:2-3, 1991 Official Free Franking Markings, RFC 131:2-4, 1991 List of Pre-Postage Markings Part I, RFC 132:4-6, 1991 List of Pre-Postage Markings Part 2 and 3, RFC 133:4, 134:2, 1992 "Fierro" Markings, RFC 135:4-6, 1992 Way Bill from Cartago to Moin 1843, RFC 156:2, 1993 Alajuela Reception Office Postal Markings, RFC 160:3-6, 1994 Heredia Reception Office Postal Markings, RFC 161:3-5, 1994 Heredia Reception Office Postal Markings, RFC 163:2-3, 1994 "Guanacaste" Postal Markings , RFC 166:2-6, 1994 "Camino al Atlántico" Postal Marking, RFC 168:5-6, 1994 The Longest Postal Marking on the First Issue, RFC 214:4-5, 1998 Postal Marking "Comandancia del Norte" Duplicate, RFC 221:2-6, 1999 Double Postal Markings in FDC of 2003 Christmas Tax Stamp, RFC 277:1, 2004 Guanacaste Pre Stamp Postal Markings, RFC 287:3-6, 2004 Postal Marking "Comandancia de las Fronteras", RFC 297:2-3, 2005 Marking "Administr. Gral. Correos de Costa Rica" in the First Issue, RFC 303:2-4, 2006 "Receptoria de Alajuela" Marking in the Postal Service, RFC 348:3-6, 2014 Franking Marking "Comandancia de las Fronteras", RFC 353:2, 2014 Pre-stamp Cancellations of Guanacaste, RFC 353:3-6, 2014 The Franking Marking "Comandancia de las Fronteras", RFC 357:3-5, 2014 Franking Marking "Comandancia del Norte" Duplicate, RFC 361:2-7, 2015 Franking Marking of Military Posts, RFC 363:4-5, 2015 Official Franking Marking "Jefatura Politica de Paraiso", RFC 386:1-3, 2016 Franking Marking "Comandancia del Norte" Duplicate, RFC 394:2-6, 2017

Postal Meters Topical Collection of Postal Meter Labels, RFC 178:2-12, 1995 Machine Cancellation in the 1936 Coco Island Issue, RFC 281:3, 2004

Postal Museum CR Philatelic and Numismatic Museum, RFC 145:1, 1993 Correos de Costa Rica Museum Book Marks, RFC 227:2, 1999

Postal Rates New Postal Rates, RFC 041:1, 1983 Postal Rates in 1847, RFC 041:8, 1983 Postal Rates 1984, RFC 051:1, 1984 Postal Rates 1984, RFC 054:3, 1984 Postal Rates Dec 87, RFC 086:1, 1988 Postal Service and Rates in 1919, RFC 108:3-6, 1989 Postal Rates 1942, RFC 110:2-5, 1990 Postal Rates- Dec 1991, RFC 131:1, 1991 Postal Rates-Spring 1993, RFC 142:1, 1992 Postal Rates May 1995, RFC 171:1, 1995 Postal Rates 19 May 1995, RFC 172:5-6, 1995 Postal Rates 1998, RFC 211:1, 1998 Postal Rates 1999, RFC 232:1, 2000 Postal Rates 2002, RFC 254:3, 2002 Postal Rates 2002, RFC 255:4, 2002 Postal Rates June 2004, RFC 282:1, 2004 New Postal Rates for May 2006, RFC 301:1, 2006 Postal Rates November 2008, RFC 318:1, 2008 Postal Rates 2010, RFC 326:6, 2010 New Postal Rates for October 2017, RFC 403:2-6, 2018

Postal Service Coco Island Post Office Opening, RFC 004:3-8, 1979 Restrictions to Export CR Stamps, RFC 017:1, 1980 The Postal Service in 1857, RFC 029:1-2, 1982 Notes on CR Postal Service Part I, RFC 069:1-6, 1985 Notes on CR Postal Service Part II, RFC 070:3-6, 1985 Notes on CR Postal Service Part III, RFC 071:4-6, 1985 Import Tax on Postal Stamps, RFC 078:1-2, 1986 Colonial Postal Service in CR, RFC 103:1-2, 1989 Decree LXXXIX Regulates Postal Service in 1847, RFC 112:2-6/113:2-6,1990 Central Bank Stamp Stock 5/7/90, RFC 115:3-4, 1990 "S.S. Colombie" in the CR Postal Service, RFC 125:5-6, 1991 Postal Service Organization and Authorization of 1863 Stamps, RFC 126:4-6, 1991 Central Bank Stamp Stock 3/26/92, RFC 135:3, 1992 Loss of Registered Philatelic Covers in the Mails, RFC 144:5-6, 1992 Origins of the Costa Rica Postal Services, RFC 157:5-6, 1994 Personnel of the General Post Office- January 1865, RFC 164:2-3, 1994 Central Bank Stamp Stock February 1994, RFC 167:6, 1994 Cartago Reception Office Markings, RFC 173:2-6, 1995 The "Simon Bolivar" in the Costa Rica Postal Service, RFC 174:2-4, 1995 San Jose Reception Office, RFC 176:2-4, 1995 Registered Letter Receipt 1874, RFC 177:5, 1995 New Postal Service Laws and the AFCR, RFC 194:1-4, 1997 New Postal Service Laws and the AFCR, RFC 197:1, 1997 A Postman is Assaulted in 1861, RFC 197:4-6, 1997 The Origin of Costa Rica Postal Money Orders, RFC 199:2-6, 1997 Banks Stock of Postage Stamps Feb. 2001, RFC 241:5-7, 2001 Difficulties Providing New Postal Issues by Central Bank, RFC 243:1, 2001 Free Franking for a Private (School) Business, RFC 244:2-5, 2001 Bank Stock of Postage Stamp in 1999, RFC 245:6, 2001 Bank Stock of Postal Stationery, RFC 246:2, 2001 Issue Delay of 65 Surcharge (Sc 553), RFC 248:2, 2001 Bank Stock of Postage Stamp in 2001, RFC 248:3, 2001 Bank Stock of Postage Stamps in 2001, RFC 249:2. 2001 Puntarenas Post Office: 1 Sep 1877, RFC 251:2-5, 2001 Bank Stock of Postage and Revenue Stamps 2002, RFC 253:2-3, 2002 Status of Junta Filatelica, RFC 254:1-2, 2002 Bank Stock of Postage Stamps in 2002, RFC 255:6, 2002 Changes to the Postal Law, RFC 257:1, 2002 International Postal Service During the First Issue, RFC 258:4-6, 2002 Members of the Technical Philatelic Commission, RFC 259:1, 2002 Stock of Postal Stationery in Post Office, RFC 260:2, 2002 Offer to Buy Post Office Central Building, RFC 261:1, 2002 Stock of Postage Stamps and Stationery in Post Office November 2002, RFC 263:5-6, 2002 Faith of 65C Surcharges of 2001, RFC 266:1-2, 2003 Report Technical Philatelic Commission, RFC 267:2-3, 2003 Imperforate Postage Stamps in the Central Bank, RFC 268:1, 2003 Discounted Fiscal Paper in Guanacaste 1885, RFC 270:2-4, 2003 Stock of Postage Stamps and Stationery in Post Office July 2003, RFC 271:5, 2003 Destruction of Defective Stamps (568), RFC 280:7, 2004 Stock of Postage Stamps and Stationery in the Post Office May 2004, RFC 281:5, 2004 Certificate of Destruction of Defective Stamps 2003 Issues, RFC 284:5-6, 2004 Stock of Postage Stamps and Stationery in Post Office September 2004, RFC 285:4, 2004 Certificate of Destruction of Defective Stamps 2003 Issues, RFC 285:5-6, 2004 Certificate of Destruction of Defective Stamps 2003 Issues, RFC 286:6, 2004 Certificate of Destruction of Defective Stamps 2003 Issues, RFC 288:6, 2004 Stamp Issue Program for 2005, RFC 289:1, 2005 Correos de Costa Rica Auction of Ruminants, RFC 290:1-2, 2005 Purchase Limitation of 2005 Rotary Issue, RFC 291:1-2, 2005 Mariano Montealegre and the Postal Service, RFC 291:3-6, 2005 2005 Rotary Issue Distribution, RFC 293:1, 2005 Stock of Postage Stamps and Stationery in the Post Office May 2005, RFC 295:56, 2004 Dispute of Philatelic Technical Commission and the Post Office, RFC 296:1-5, 2005 Post Office Answer Philatelic Technical Commission Concerns, RFC 297:1, 2005 Suggested Subjects of 2006 Postal Issues, RFC 297:4, 298:6, 2005 Stock of Postage Stamps and Stationery in the Post Office October 2005, RFC 300:6, 2005 Way Bills in the Postal Service of the XIX Century, RFC 301:2-6, 2006 Stock of Postage Stamps and Stationery in the Post Office June 2006, RFC 303:6, 2006 Dispute About Postal Card Issues, RFC 305:1-6, 2007 Stock of Postage Stamps and Stationery in the Post Office January 2007, RFC 306:6, 2007 Stock of Postage Stamps and Stationery in the Post Office March 2007, RFC 309:6, 2007 Stock of Postage Stamps and Stationery in the Post Office October 2007, RFC 310:5, 2007 Stock of Postage Stamps and Stationery in the Post Office July 2008, RFC 315:3, 2008 Stock of Postage Stamps and Stationery In the Post Office May 2008, RFC 320:6, 2009 Panama Agency in the Postal Service XIX Century Duplicate, RFC 352:4-6, 2014 Foreign Mail Management of the First Issue, RFC 365:4-6, 2015 Finance Dispositions of 1839 and Its Relevance in the Postal Service, RFC 366:1-8, 2015 Finance Dispositions of 1839 Implementations in the Postal Service, RFC 371:1-4, 2015 Santa Cruz Guanacaste in the XIX Century Postal Service, RFC 389:3-6, 2016 Postal Service Administrators in the XIX Century, RFC 397:2, 2017 Santa Cruz Guanacaste Postal Service, RFC 398:4-6, 2017 Mariano Montealegre and the Postal Service (duplicate), RFC 399:3-6, 2017 Carrillo in the Postal Service, RFC 400:3-7, 2017

Postal Stationery Postal Card 1923 Proof, RFC 007:3, 1980 Newspaper Wrapper of 1923, RFC 024:6-7, 1981 Essay Using the 1901 "1 Ct", RFC 030:3-4, 1982 Interesting Postal Stationery Card, RFC 076:4, 1986 Postal Stationery Cover: 10c of 1886, RFC 076:5-6, 1986 Proofs of 1923 Postal Stationery Envelopes, RFC 085:4-5, 1987 Proofs of 1923 Postal Stationery Envelopes, RFC 086:4-5, 1988 National Legislature 1963 Postal Stationery, RFC 097:2-3, 1989 Columbus Fleet Postal Stationery Envelopes, RFC 103:3-6, 1989 Curious "Cecogram" Issued in December 1990, RFC 127:4-7, 1991 Important Registered Cover of June 6, 1916, RFC 151:2, 1993 Inverted Overprinted in Official Postal Stationery Envelope, RFC 152:1, 1993 Double Overprint on the 4c Postal Card of 1903, RFC 158:1, 1994 New Envelope Issue for 1994, RFC 160:2, 1994 1883 Postal Card used in 1898, RFC 170:1, 1995 Varieties and Errors of 1996 Envelope, RFC 224:2-3, 1999 Postal Card with Sc 84 of Dec. 1913, RFC 239:4, 2000 Late Used of the 1 Cent Stamp of 1901 on Postal Card, RFC 243:2, 2001 Errors of Postal Card PC30 (2000), RFC 249:3, 2001 Envelope Commemorate F Chang Space Flight (EN32), RFC 258:1-3, 2002 Envelope Commemorating of Columbus Visit (EN33), RFC 261:3, 2002 Postal Cards with Ecological Photos 1999, RFC 264:2-5, 2002 Two Types of Paper on Sor Maria Romero Envelopes EN31, RFC 274:4, 2003 EXPOFILA 2004 Exhibition EN35, RFC 281:2, 2004 Postal Card Used by Post Office, RFC 288:5, 2004 New Postal Cards Issue 2005, RFC 295:1, 2005 Official Postal Stationery Used by Post Office, RFC 295:2-5, 2005 A Postal Card not Announced by the Post Office, RFC 308:1-2, 2007 Non Circulated Stamped Envelope Rio Group Summit 2002, RFC 309:1-5, 2007 Mirror Impression on the 20C Envelope of 1994 (EN21), RFC 326:5, 2010 Color Proofs of 1996 Postal Stationary Cover, RFC 336:1-2, 2012 Collecting Postal Stationery, RFC 358:1. 2014 Non Circulated Stamped Envelope Rio Group Summit 2002 Duplicate, RFC 382:1-5, 2016 Post Card PC16 used in 1931, RFC 382:6, 2016 Post Card PC16 used in 1925, RFC 395:2, 2017 Postal Card Fine in the USA 1890, RFC 399:1, 2017 Embossed Indicium without Color, RFC 402:5-6, 2017

Proofs Postal Card 1923 Proof, RFC 007:3, 1980 Die Proofs of 1967 Churches Issue, RFC 036:5-6, 1983 Die and Plate Proofs of 1884-88 Revenue Stamps, RFC 047:3-5, 1984 First Issue Proofs, RFC 053:2, 1984 Airmail Imperforated Waterlow Proofs, RFC 066:5-6, 1985 Imperforated Proofs of the 1901 Issue, RFC 070:1-2, 1985 Proofs of 1923 Postal Stationary Envelopes, RFC 085:4-5, 1987 Proofs of Bolivar Issue, RFC 085:6, 1987 Proofs of 1923 Postal Stationary Envelopes, RFC 086:4-5, 1988 Bolivar Issue Proofs, RFC 087:2, 1988 Color Plate Proofs of the Cervantes Issue of 1947, RFC 153:2-3, 1993 Die Proofs of the Ricardo Jimenez Issue, RFC 174:5-6, 1995 Die Proof of Poas Volcano Issue Sc C30, RFC 212:6, 1998 Die Proofs of Poas Volcano Issue Sc C28-30, RFC 214:2-3, 1998 A Proof of the 10c Stamp Issue 1901, RFC 217:1, 1999 Surcharge Proofs of 1946 Check Revenue Stamps, RFC 238:3-4, 2000 American Bank Note Photographic Proofs, RFC 283:2-5, 2004 Agrarian Revenue Stamp Plate Proofs, RFC 306:4-5, 2007 Dos Reales Proof with Red Specimen Overprint, RFC 307:2, 2007 Die Proofs of the Departure Revenue Stamps, RFC 322:1, 2009 Color Proofs of 1996 Postal Stationary Cover, RFC 336:1-2, 2012 Specimen Proofs of Dos Reales stamp, RFC 359:6, 2014 Chroming Proofs Social Security Issue 1993 (Sc 460), RFC 362:1, 2015

Remainders Incineration of Stamps, RFC 003:7, 1979 Incineration and Remainders, RFC 006:4, 1979 Used Stamp Auction of 5/31/1912, RFC 133:2-3, 1992

Revenue Stamps Revenue Stamps Overprinted "Muestra" 1960, RFC 016a:9, 1980 Revenue Use of Sc 225, RFC 022:5, 1981 Postal Use and Cancellations on the 1883-7 Revenue Stamps, RFC 023:2-7, 1981 Varieties and Errors of 1956 Revenue Stamps, RFC 024:2, 1981 "Impuesto Cruz Roja" 1945 Surcharge, RFC 026:2-4, 1982 Revenue Stamps of 1891 and Their Postal Use, RFC 032:3-7, 1983 Forgery of the 1888 Proportional Revenue Stamp, RFC 034:3, 1983 Postal Used Revenue Stamps, RFC 035:2-5, 1983 Overprints Proofs of 1946 Revenue Stamps, RFC 036:4, 1983 University Revenue $1 Imperforated Stamp, RFC 037:1-4, 1983 University Revenue 50c Imperforated Stamp, RFC 037:5-8, 1983 Revenue Stamp 2c of 1884 Block, RFC 038:5, 1983 Book Parcel Postal Tax Stamps (Renta Postales), RFC 043:2-6, 1983 Saenz Revenue Stamp Catalogue: First Update, RFC 045:3-4, 1983 Orphan's Revenue Stamps, RFC 047:2, 1984 Die and Plate Proofs of 1884-88 Revenue Stamps, RFC 047:3-5, 1984 Unreported Overprint Proof 1949 Revenue Stamps, RFC 047:6, 1984 Essays on Heredia Electrification Revenue Stamps, RFC 054:1, 1984 Fiscal Use of the 1901 Issue, RFC 055:1, 1984 Overprint "Defensa Economica" on 1934 Airmail Issue, RFC 055:2-5, 1984 Telegraph Stamps 1927 and its Postal and Revenue Overprints, RFC 060:4-7, 1985 Coffee Office Revenue Stamp, RFC 062:1-2, 1985 Hospital Puerto Cortes Revenue Stamp, RFC 073:1, 1986 Postal Use of Sport Revenue Stamp, RFC 108:1, 1989 Revenue Stamp 1990 Stock, RFC 111:1, 1990 Are Revenue Stamps Philatelic?, RFC 114:1-3, 1990 Revenue Stamps Bank Report, RFC 121:4, 1991 Guanacaste Overprints on Revenue Stamps, RFC 125:3-4, 1991 Surcharges on Revenue Stamps (1987), RFC 128:2, 1991 Revenue Stamp Authorizing Laws, RFC 131:5, 1991 New 1992 Revenue Stamp, RFC 135:3, 1992 1883 Postal Stamps in Revenue Paper, RFC 147:2-5, 1993 New Two Colones Revenue Stamp 1992, RFC 153:3, 1993 New Revenue Stamps Printed by F.C. Oberthur, RFC 155:1, 1993 Revenue Stamps Used as Postage Stamps, RFC 183:3-5, 1996 Second Printing of the Revenue Stamp of 1883, RFC 184:4-5, 1996 Fernandez Issue of 1883 Used on Revenue Paper, RFC 200:3-6, 1997 Revenue Stamps of 1883, RFC 211:2-4, 1998 Plate Proofs of the Forensic Revenue Stamps of 1946, RFC 220:3-5, 1999 New Revenue Stamps 1999, RFC 232:2, 2000 Essay of Red Cross Revenue Stamp, RFC 232:3, 2000 Revenue Stamps in Use in 2000, RFC 233:1, 2000 Surcharge Proofs of 1946 Check Revenue Stamps, RFC 238:3-4, 2000 Bank Stock of Revenue Stamps in 2000, RFC 239:5, 2000 Departure Tax Revenue Stamps, RFC 242:5-6, 2001 New Revenue Stamp Issues, RFC 251:6, 2001 Surcharges on Revenue Stamps (2001), RFC 252:6. 2001 More Surcharges on Revenue Stamps, RFC 253:6, 2002 New Revenue Stamps 2002, RFC 255:6, 2002 Fiscal Use of the 1889 Soto Issue, RFC 269:2-6, 2003 New Revenue Stamps 2003, RFC 272:4, 2003 Imperforate Archive Revenue Stamp 1990, RFC 275:6, 2003 Surcharges on 2 Cents Regular Revenue Stamps 1988, RFC 280:2, 2004 New Printing of Revenue Stamps 2004, RFC 281:6, 2004 Blank Secretary of Finance Cancellation on 1870 Revenue Stamps, RFC 282:5-6, 2004 Seldom Known Revenue Stamps, RFC 284:2-4, 2004 New Revenue Stamps for 2004, RFC 285:3, 2004 Type G2 Guanacaste Revenue Stamps Use, RFC 286:2-4, 2004 Revenue Stamps of 1882, RFC 289:2, 2005 Revenue Stamps on Documents, RFC 290:3-6, 2005 Mobil Revenue Stamp of 1925, RFC 299:5:6, 2005 Archaeology Revenue Stamp, RFC 302:2, 2006 Revenue Stamp for Pawn Microfilm, RFC 304:6, 310:4, 2006-7 Agrarian Revenue Stamp Plate Proofs, RFC 306:4-5, 2007 Topography Revenue Stamps, RFC 307:3-4, 2007 Security Markings in 1971 Revenue Stamps, RFC 315:2, 2008 Regular and Archive Revenue Stamps Varieties , RFC 316:2-3, 2008 Die Proofs of the Departure Tax Revenue Stamps, RFC 322:1, 2009 The Surcharge "Rentas Postales" Designed by A. Chinchilla, RFC 326:3-4, 2010 Departure Tax Revenue Stamps of 1991, RFC 335:2-3, 2012 Medical Association Revenue Stamp from 1944 to 1949, RFC 336:3-6, 2012 Guanacaste Revenue Stamps of 1883, RFC 347:2-4, 2014 Departure Tax Revenue Stamps, RFC 348:1-2, 2014 Fiscal Use of the 1889 Soto Issue, RFC 349:2-6, 2014 Update on Revenue Stamps 1870-90, RFC 351:2-4, 2014 Revenue Use of the 1887 Soto Issue, RFC 356::4-5 Damaged Overprint on 1952 Revenue Stamps, RFC 357:1, 2014 Revenue Paper Discount for Guanacaste in 1885 Duplicate, RFC 362:2-4, 2015 Education and Culture Revenue Stamps, RFC 363:1, 2015 Update on Revenue Stamps 1891-1910, RFC 364:2-3, 2015 Security Markings in 1870 and 1882 Revenue Stamps, RFC 367:1-8, 2015 Security Markings in 1870 and 1882 Revenue Stamps, RFC 367:1-8, 2015 Revenue Stamps of 1882, RFC 368 3, 2015 Book Parcel Postal Tax Stamps (Renta Postales), RFC 370:1-6, 2015 Postal use of "Renta Postales" Postal Tax Stamp, RFC 379:1, 2015 Revenue Stamps and Legal Paper overprinted Guanacaste 1885 to 1892, RFC 379:2-4 2015 Telegraph Stamps 1927 and its Postal and Revenue Overprints Duplicate, RFC 380:4-7, 2016 Departure Tax Revenue Stamps Duplicate, RFC 381:5-6, 2016 Renta Postales Tax Stamp in Multiples, RFC 383:5-6, 2016 Telegraph Stamps 1927 Rare Overprints, RFC 386:4-6, 2016 Revenue Paper Discount for Guanacaste in 1885 Duplicate, RFC 393:2-6, 2017 Revenue Stamp 1870 used in Esparza, RFC 395:3, 2017 University Revenue Stamp Imperforated Sheets, RFC 396:1-2, 2017 Use of 1883 Issue Stamps on Revenue Paper, RFC 397:3-7, 2017

Revenue Stamps-Municipal San Jose First Municipals Revenue Stamps, RFC 267:5-6, 2003 Municipals Revenue Stamps of San Jose, RFC 288:2-3, 2004 Municipals First Revenue Stamps, RFC 292:2, 293:2, 2005 Excessive Use of Canceller in San Jose Municipal Stamps, RFC 298:5, 2005

Revenue Stamps-Varieties Errors on 1952 Revenue Stamps, RFC 028:4, 1982 Variety of the 1945 Revenue Stamp, RFC 033:7, 1983 Perforation Variety of a Forensic Revenue Stamp, RFC 038:3, 1983 Variety of the 1930 50c Revenue Stamp, RFC 046:7, 1983 Revenue Stamp 1956 with Double Overprint, RFC 075:6, 1986 Shifted Overprints on the 2c 1956 Revenue Stamp, RFC 081:6, 1987 Varieties and Errors of 1952 Revenue Stamps, RFC 086:6, 1988 Double Surcharge in 1952 Revenue Stamps, RFC 110:1, 1990 Varieties and Errors on 1961 Revenue Stamps, RFC 149:1, 1993 1982 Postal Stamps on Revenue Paper, RFC 149:5-6, 1993 Perforation Error of 1967 Orphan Revenue Stamp, RFC 192:1, 1996 Inverted Overprint on 1946 Check Revenue Stamp, RFC 192:2-3, 1996 Varieties in the Red Cross Revenue Stamp, RFC 216:2, 1998 Displaced Perforation on a 1000C Revenue Stamp Block, RFC 244:6, 2001 Displaced Overprint in 1954 Revenue Stamps, RFC 260:5, 2002 Broken Overprint Letters in Revenue Stamps 1952, RFC 262:4, 2002 Error of the Red Cross Revenue Stamp 1948, RFC 292:1, 2005 Perforation in Departure Tax Revenue Stamp, RFC 323:1, 2009 Inverted Surcharges of Archive Revenue Stamps 1946, RFC 372:1. 2015

Review of Issue More About the Provisional Airmail of 1931, RFC 001:5, 1979 Coffee Centenary Issue, RFC 009:3-10, 1980 "Wing" Issue of 1932, RFC 011:2, 1989 "Correos 1947" Overprint, RFC 013:4-7. 1980 5c Surcharge of 1928, RFC 022:2-4, 1981 Notes on the 1901-03 Issue, RFC 031:1-8,1982 Red Cross 1922 Overprint, RFC 054:4-7, 1984 The 1929 Surcharges, RFC 065:6, 1985 Lindbergh Overprint of 1928, RFC 072:2-6, 1986 Overprint "Correos-2 Centimos", RFC 077:2-6, 1986 Overprint "Correos-2 Centimos", RFC 078:2-6,1986 Reimpression of the 1967 Church Issue, RFC 082:2-3, 1987 President Issue of 1947, RFC 085:6, 1987 New Findings in the 1901 Issue, RFC 100:5-12, 1989 Continental Defense 1942 Issue, RFC 139:5, 1992 Origin of the "1938" Overprint (Sc 189), RFC 145:3-4, 1993 Pan American Health Day Issue, RFC 169:3-6, 1995 The 1940 Surcharges Issue- Sc 190, RFC 171:2-6, 1995 Central American Independence Issue, RFC 188:3-6, 1996 Coco Island Issues, RFC 192:4-6, 1996 Coffee Harvesting Issue of 1945, RFC 228:3-6, 1999 1926 Definitive Issue: An Appendix, RFC 236:4-6, 2000 Sydney Olympics 2000 Issue: Background of the Issue, RFC 237:5-8, 2000 Jesus Jimenez Issue: New Items, RFC 241:2-4, 2001 Coffee Centenary Issue (1921) Sc 103, RFC 250:2-3, 2001 Coffee Centenary Issue (1921) Sc 103: Major Rarities, RFC 253:4-5, 2002 Justo Facio Issue of 1960 (Sc 261), RFC 275:4-6, 2003 Industries Issue of 1954: The Margins, RFC 279:4-6, 2004 Plates of 1932 5c Surcharge "Correo Aereo" (Sc C3), RFC 294:2-5, 2005 Nicoya Incorporation Issue of 1924, RFC 311:3-6, 2007 Red Cross Issue of 1935, RFC 312:2-6, 2008 The Regular Issue of 1930, RFC 313:2-6, 2008 Archbishop V.M. Sanabria Issue (Sc 525), RFC 317:2-6, 2008 R. Arias Maldonado Issue of 1924, RFC 318:3-6, 2008 Regular Issue of 1926 - Additional Values, RFC 327:3-6, 2010 Central Bank Issue (Sc 534-35), RFC 329:1-3, 2011 Surcharge on Bolivar Stamp (Sc148), RFC 331:3-6, 2011 The 5c 1947 Presidents Issue, RFC 333:1, 2012 Overprint Lindbergh and Forgeries, RFC 339:2-6, 2013 1932 Surcharge on Telegraph Stamps (C3), RFC 346:2-5, 2014 1907 Issue in the Registered Internal Mail, RFC 358:4-6, 2014 The Surcharge Issue of 1925, RFC 360:1-4, 2015 Decrees Related to 1937 First CR Fair, RFC 362:5-6, 2015 National Industries 1954-59 by Thomas de la Rue, RFC 368:1-2, 2015 Official Provisorio of 1903, RFC 374:2-6, 2015 40 cents Fernandez Issue Stamp Usage, RFC 390:2-8, 2016 Archbishop V.M. Sanabria Issue (Sc 525) Duplicate, RFC 393:1, 2017 Surcharge on Bolivar Stamp (Sc148) Duplicate, RFC 396:3-6, 2017 Virgin of the Angels Issue First Part, RFC 401:1-6, 2017 Virgin of the Angels Issue Second Part, RFC 402:1-4, 2017 Overprint "1938" , RFC 145:3-4, 1993

Ross Fantasies Ross "Oficial UPU", RFC 003:6, 1979 The "Dos Cts" Surcharge, RFC 106:2-6, 1989 Ross Fantasies: Plate Varieties on the "Oficial" Overprint, RFC 172:2-4, 1995 Ross Fantasies: Plate Varieties on the "Oficial" Overprint Duplicate, RFC 387:1-4, 2016

Samples/Specimens Salesman Samples of the First Issue, RFC 064:6-7, 1985 Overprint "Muestra" in the UPU, RFC 093:2-5, 1988 DJA, Samples and Mr. Bendon, RFC 095:2-7, 1988 Muestra and Specimen Overprints for UPU, RFC 388:3-6, 2016

SCADTA SCADTA Air Mail, RFC 158:4-6, 1994 Mancomum Mail Costa Rica SCADTA, RFC 299:1-4, 2005 More About Mancomun SCADTA Flights, RFC 300:3-4, 2005 Mancomum Mail Costa Rica SCADTA Duplicate, RFC 373:1-3, 2015

Scriba Collection Scriba Collection Dispersed, RFC 172:4, 1995 Prices for the Scriba Collection Items, RFC 173:1, 1995 Scriba Collection, RFC 176:5, 1995

Seals/Labels Telegraph Seals, RFC 002:4, 6:5, 1979 Notes on Non-Emis and Political Labels, RFC 059:5-6, 1984 Back Impression on Official Seals, RFC 077:1, 1986 Coffee Propaganda Labels in the 20', RFC 102:5-6, 1989 Masonic Label of 1965, RFC 142:2-4, 1992 Registration Labels, RFC 183:6, 1996 Coffee Propaganda Labels of the 1920', RFC 273:3-6, 2003 Custom Label with Airport Building, RFC 300:4, 2005 Coffee Promotion Labels of 1920', RFC 350::3-6, 2014

Ships/Maritime Mail "USS Manley" Visits Limon, RFC 003:3, 1979 Cruiser "Portland" Visits Coco Island, RFC 017:7-11, 1980 Paquebot Cancellation of the Great White Fleet, RFC 034:4-6, 1983 "Juan Sebastian de Elcano" Visit, RFC 036:3, 1983 Royal Mail Lines Ltd., RFC 063:1-2, 1985 Ship Postal Markings, RFC 074:5-6, 1986 "S.S. Colombie" in the CR Postal Service, RFC 125:5-6, 1991 Sinking of "Fella" and "Eisenach" in the Port of Puntarenas, RFC 168:2-5, 1994 The "Simon Bolivar" in the Costa Rica Postal Service, RFC 174:2-4, 1995 Veragua Class Boats of the United Fruit Co., RFC 182:4-6, 1996 Cruiser "Portland" Visit Coco Island (Part 2), RFC 187:4-6, 1996 Mail Steamers in Guanacaste, RFC 213:3-6, 1998 "Hamburg-Amerika Linie" Ships "Caribia" and "Cordillera", RFC 222:5-6, 1999 Cruiser "Portland" Visit Coco Island, RFC 226:3, 1999 The "SS Esparta" of the Great White Fleet, RFC 245:5, 2001 The "SS Musa" of the Great White Fleet, RFC 248:4-5, 2001 The "SS Toloa" of the Great White Fleet, RFC 254:4-6, 2002 The "SS Ulua" of the Great White Fleet, RFC 256:2-5, 2002 The Dutch Steamer "Costa Rica", RFC 265:4-6, 2003 "USS Fairfax" Visit to CR, RFC 274:5-6, 2003 Cruiser "Houston" Visit to Coco Island, RFC 276:4-6, 2003 Steamship "Ulua" of the Great White Fleet, RFC 322:4-6, 2009 Steamship "Esparta" of the Great White Fleet, RFC 324:2-3, 2009 The Atlas Line in the Costa Rica Postal Service, RFC 342:2-3, 2013 Origin of "Atlas Service" of Hamburg American Line, RFC 354:2-6, 2014 Ship Wrecking Cover from Panama Recovered in1892, RFC 355:2. 2014 Origin of "Atlas Service" of Hamburg American Line Duplicate, RFC 359:2-5, 2014

Socorico Socorico and its Costa Rican Collaborators, RFC 123:1-2, 1991 Meeting October 2015 in San Jose, RFC 375:1, 2015

Souvenir Sheets Souvenir Sheet of Sc 242, RFC 022:7, 1981 Postal Use of the 1937 Souvenir Sheet, RFC 117:2, 1990 American Bank Note Co. CR Souvenir Sheets at APS Meeting, RFC 140:1-2, 1992 Souvenir Sheet of 1995 Christmas Tax Stamp, RFC 179:1-3, 1995 Souvenir Sheets of 1995 Christmas Tax Stamp and America UPAEP Issue, RFC 181:1-3, 1996 Souvenir Sheets Issued in Costa Rica, RFC 185:2-6, 1996 Souvenir Sheet of the 1984 X Philatelic Exhibit (312a), RFC 281:4, 2004

Special Delivery Special Delivery Varieties, RFC 002:3, 1979 1976 Special Delivery Issue Perforation Varieties, RFC 042:7, 1983 Express Mail in 1913, RFC 306:2, 2007

Stamped Paper 150 Years of Stamped Paper, RFC 303:6, 2006 Surcharges on Stamped Paper, RFC 310:3-4, 2007 Error in Stamped Paper of 1906, RFC 320:2-3, 2009

Telegraph Unknown Telegraph Card, RFC 017:2, 1980 Telegraph Cancellation, RFC 018:2, 21:3, 1980 Perforated Cancellations on 1910 Telegraph Stamps, RFC 024:3-4, 1981 Telegraph Use of 1925-27 Postal Stamps, RFC 050:3-8, 1984 Telegraph Stamps 1927 and its Postal and Revenue Overprints, RFC 060:4-7, 1985 1929 Surcharge on Telegraph Stamp (Sc 149d) Imperforated Left, RFC 062:2, 1985 Telegraph Stamps, RFC 081:2-3, 1987 Telegraph Stamps, RFC 118:2-3, 1990 More About Telegraph Stamps, RFC 120:5-6, 1990 Telegraph Forms of 1920, RFC 129:3-4, 1991 Telegraph Stamps 1927 and its Postal and Revenue Overprints Duplicate, RFC 380:4-7, 2016

Topical Columbus in Cariari, RFC 130:2-5, 1991 The Oxcart in a 1992 Issue, RFC 136:1-2, 1992 National Theater in the Costa Rican Philately, RFC 165:1-3, 1994 Topical Collection of Postal Meter Labels, RFC 178:2-12, 1995 Guarumo Tree, RFC 201:5-6, 1997 Conservation Stamps and Lithographies, RFC 203:5-6, 1997 Conservation Stamps and Lithographies, RFC 204:2-4, 1997 Modern Philately and Speculative Issues, RFC 209:2-9, 1998

Variable Value Stamps New ATM Machines, RFC 259:1, 2002 Variable Value Stamps, RFC 262:1-3, 2002 Report Technical Philatelic Commission, RFC 267:2-4, 2003 Non Postal Use of ATM Stamps, RFC 278:1-2, 2004

Varieties and Errors 1930 Airmail Surcharge Variety (Smoker's Pipe), RFC 002:2, 1979 Special Delivery Varieties, RFC 002:3, 1979 Year of the Child Varieties, RFC 002:3, 9:11, 19:7,198 Cover with a Variety of Sc 80, RFC 004:2, 1979 Alexander Bell Issue Varieties, RFC 005:5, 1979 UPU Centenary Issue Varieties, RFC 006:2-3, 1979 Inverted Surcharge of 1947, RFC 007:5:6, 1980 C103 Varieties, RFC 007:6, 1980 Displaced 1953 Surcharges, RFC 009:2, 1980 Engraver's Marks on the 5c of 1901, RFC 012:2-4, 1980 Fernando de Oviedo Issue Varieties, RFC 013:13, 1980 Mirror Image on the Back of the 20c Official (O68), RFC 014:3, 1980 Inverted Center: 1921 Independence Issue, RFC 014:5-6, 1980 Christmas Traditions Issue Varieties, RFC 018:6, 1980 Mirror Image Audit Office Issue, RFC 018:6-7, 1980 Varieties on the 3c 1921 Independence Issue, RFC 019:2, 1981 Fire Brigade Issue Varieties, RFC 022:6, 1981 Mirror Image on Back of 5c, RFC 024:4, 1981 Orchid 1975 Issue Varieties, RFC 025:1, 1981 Two Plates of the 1945 Airmail Issue, RFC 027:3-4, 1982 Imperforated 1901 5c, RFC 028:5, 1982 The G(n)anacaste Error, RFC 028:6-7, 1982 Blood Donors Issue: A Missing Stamp, RFC 032:2, 1983 "Roman Numerals" on Cover (82c), RFC 033:1, 1983 Varieties of Sc C677, RFC 034:3, 1983 Constant Varieties of the 5c Plate (Sc C3), RFC 037:5-8, 1983 Variety of Sc 73 (10c), RFC 038:11, 1983 Christmas Tax Stamp 1972 Varieties, RFC 039:3, 1983 Illustration of a Double Surcharge in Block (Saenz 227i), RFC 042:2, 1983 Displaced Surcharge on Sc C10, RFC 042:6, 1983 Agricultural Products Issue Varieties, RFC 042:7, 1983 Orchid 1975 Issue Varieties, RFC 045:1, 1983 Major Varieties of the 1945 Overprint, RFC 045:7-9, 1983 1911 Overprint "Correos-2 Centimos" Varieties and Errors, RFC 048:1-11, 1984 Plate Marking in 1970 Christmas Tax Stamp, RFC 049:4-5, 1984 Guanacaste Anniversary Issue Varieties, RFC 051:5, 1984 Guanacaste Anniversary Issue Varieties, RFC 051:5, 1984 Variety of the 1946 15c Overprint, RFC 052:1, 1984 Varieties 1971 Christmas Tax Stamp, RFC 052:2, 1984 New Aspects of the 1921 Bolivar Issue, RFC 053:1, 1984 Christmas Tax Stamp 1965 Varieties, RFC 053:3, 1984 Variety on the 5c 1956 Overprint, RFC 054:2, 1984 Hispanic Culture Issue Varieties, RFC 055:6, 1984 Varieties on 25c Nicoya Issue (Sc C636), RFC 056:2, 1984 Color Variation on Nicoya Issue (Sc C638), RFC 056:3, 1984 Rotary Issue Varieties and Errors, RFC 057:2, 1984 Varieties and Errors on the 40c Woman's Year Issue, RFC 057:4, 1984 Double Transfers on the 20c Soto Issue, RFC 057:5-7, 1984 Double Transfer on the 50c Soto Issue, RFC 058:3, 1984 Varieties on the 10C Alberto M. Brenes Issue, RFC 059:3, 1984 Color Shift on the Orchid Issue, RFC 061:1, 1985 Constant Variety on the 1910 4c Stamp, RFC 061:6, 1985 Guanacaste Double Overprints, RFC 062:3-5, 1985 Minor Varieties in Guanacaste Plate G-1, RFC 063:3-6, 1985 Varieties of Guanacaste Overprints G56-59, RFC 064:1-2, 1985 Double Impression on Sc 1, RFC 065:1, 1985 Imperforated Stamps of the 1976 Special Delivery Issue, RFC 066:1, 1985 Varieties of the 1.40C of the Orchid Issue, RFC 071:1, 1985 Postal Use of the 1907 Imperforates, RFC 071:2-3, 1985 CR 75 Issue Varieties, RFC 073:6, 1986 Amateur Radio Clubs Issue Varieties, RFC 075:1, 1986 Esparza Issue Varieties, RFC 075:1, 1986 Inverted "Correos" in the 10C of 1911, RFC 077:6, 1986 Errors and Varieties in Guanacaste Overprints, RFC 080:2-6, 1986 Two Plates Used in the 1C of Soccer Cup Issue, RFC 082:5. 1987 Error DJA in the Pan-American Health Day Issue, RFC 091:4, 1988 Rained Variety of the 1941 Soccer Issue, RFC 091:5, 1988 Varieties and Errors on the 10c United Nations Issue, RFC 092:2-3, 1988 Inverted Surcharge on Sc 148, RFC 094:5, 1988 Inverted Overprint on the 5c 1945 Airmail Issue, RFC 094:5-6, 1988 DJA, Samples and Mr. Bendon, RFC 095:2-7, 1988 "Rainy" Variety of the 1941 Soccer Issue, RFC 099:3, 1989 Varieties of the 10c 1956 Industries Issue, RFC 102:1, 1989 Inverted Surcharge of 1928, RFC 104:3-5, 1989 Non Constant Varieties on the Mauro Fernandez Issue, RFC 104:6, 1989 Inverted "1945" on the 5c Airmail Issue, RFC 105:1-3, 1989 Shifted Colors in National Museum Issue, RFC 106:1, 1989 Damaged Overprint on 1944 Presidential Meeting Issue, RFC 108:6, 1989 Double Overprint on the 10c Coffee Propaganda Issue, RFC 114:6, 1990 Color Shift on the 1C Olympic Games of 1974, RFC 115:2, 1990 Double Surcharge on 35c Industries Issue, RFC 118:1, 1990 1946 Surcharge Error, RFC 122:2-4, 1991 1946 Overprint Varieties, RFC 124:2-5, 1991 Missing Color in C877, RFC 132:3, 1991 National Museum Issue Varieties, RFC 135:2, 1992 Pope Paul Issue Minor Varieties, RFC 137:6, 1992 Surcharges of the 1936 Coco Island Issue, RFC 139:3-4, 1992 1983 Surcharge Issue Minor Varieties, RFC 141:6, 1992 Assisi Issue Minor Varieties, RFC 143:6, 1992 LACSA 1966 Issue Minor Varieties, RFC 144:4-5, 1992 Varieties and Errors 1979 Christmas Tax Stamps, RFC 146:1, 1993 Plate Varieties of Un Peso First Issue, RFC 148:6, 1993 Varieties and Errors 1921 Independence Issue, RFC 149:2-4, 1993 Varieties/Errors Independence Centenary Issue, RFC 149:2-4, 1993 Cuatro Reales Plate Varieties, RFC 150:4-6, 151:3-7,1993 Variety on Telecommunications issue of 1993, RFC 157:1, 1994 Double Overprint on the 4c Postal Card of 1903, RFC 158:1, 1994 Varieties on the Simon Bolivar Issue of 1983, RFC 159:1, 1994 1911 Overprint in the Coronas Collection, RFC 159:2-6, 1994 Paper Folds on the Jesus Jimenez Issue of 1923, RFC 164:4-6, 1994 Variety of the "Blue Moon" Jose Marti Issue 1995, RFC 174:1, 1995 Varieties on the Christmas Tax Stamp of 1970, RFC 176:6, 1995 Inverted Centers of the 1907 Issue, RFC 185:1, 1996 Varieties of Overprint of Sc 421, RFC 186:1, 1996 Varieties of Sc 452, RFC 186:6, 1996 Inverted Center of 1907, RFC 187:6, 1996 "Guagacaste" Error in Plate VII, RFC 194:4-5, 1997 Constant Variety on Sc 297, RFC 194:6, 1997 Inverted Guanacaste in Plate I, RFC 195:2-4, 1997 Varieties of Sc 254, RFC 195:5, 1997 Varieties of Sc C249, RFC 195:5, 1997 Varieties of Sc 348, RFC 195:6, 1997 Varieties of Sc C666, RFC 195:6, 1997 Inverted Guanacaste in Plate I, RFC 196:4-5, 1997 Varieties of Sc C610, RFC 196:6, 1997 Varieties of Sc C734, RFC 196:6, 1997 Varieties on the 5 c of 1882 Stamp (Sc 12), RFC 197:3, 1997 Variety of Sc 60, RFC 198:4-5, 1997 Minor Varieties of Sc C396, RFC 200:7-8, 1997 Error of President Arias Issue Sc 395, RFC 216:3-4, 1998 Varieties of Sc 514, RFC 217:5-6, 1999 Varieties of Sc 396, RFC 218:1, 1999 Varieties of Sc 396, RFC 218:1, 1999 Double Entry on Sc 3, RFC 223:2-4, 1999 Varieties of Guanacaste Plate III (G1), RFC 227:3-6, 1999 Error of 1965 Christmas Tax Stamp, RFC 228:2, 1999 Double Error in a 1972 Christmas Tax Stamp, RFC 231:6, 2000 Double Surcharge on the 1958 Christmas Tax Stamp, RFC 233:5, 2000 Horizontal Imperforate CT78 of 1978 Issue, RFC 236:1. 2000 Block of 12 with Double Surcharge C336, RFC 239:1, 2000 Incineration of Defective Stamps of Sidney Olympic Issue, RFC 247:7, 2001 Color Displacement of C500 (1972), RFC 248:2, 2001 Errors of Postal Card PC30 (2000), RFC 249:3, 2001 Constant Varieties of the Surcharge Correos- 1922 (Sc 111), RFC 249:4, 2001 Double Surcharge on 45c of 1925 (Sc 139), RFC 255:5, 2002 Constant Varieties of 1981 Christmas Stamps, RFC 256:6, 2002 Constant Variety of 1981 Christmas Stamp, RFC 257:5, 2002 Constant Variety of 1981 Christmas Stamp, RFC 257:6, 2002 Double Overprint of Official of 1908 (O50), RFC 261:2, 2002 Constant Variety of "Grupo Rio" Issue 2002, RFC 263:4, 2002 Varieties on America UPAEP 2003 (Sc 567), RFC 270:5, 2003 Constant Variety of 1973 Christmas Stamp, RFC 272:6, 2003 Different Ink in the 10 Cent Surcharge Stamp on Fauna 1963 (C367), RFC 276:2, 2003 Color Varieties in the Cocori Stamp (568), RFC 278:2, 2004 Broken Design on 2003 Christmas Stamp, RFC 278:3-4, 2004 A Variety of Christmas Stamps of 1978, RFC 285:2, 2004 Mirror Impression on the 500C Patriotic Symbols Issue 1990, RFC 286:5, 2004 Varieties in UPAEP 2004 Issue (573-76), RFC 288:1, 2004 Imperforate Error of the Medio Real Second Plate, RFC 296:6, 2005 Double Surcharge of the 5c Surcharge of 1953 (Sc 257), RFC 302:1, 2006 Varieties on the 2c 1901 Issue, RFC 302:3-4, 2006 Error in Jerusalem Anniversary Issue (Sc 490), RFC 306:3, 2007 Varieties of 1937 Orchid Issue (Sc 184), RFC 310:2, 2007 LACSA Anniversary Issue Varieties, RFC 314:1-2, 2008 Double Transfer on 2 Colones Coco Island (Sc 175), RFC 347:1, 2014 Surcharge on Bolivar Stamp (Sc148), RFC 331:3-6, 2011 Varieties of the 1925 Surcharge Issue, RFC 363:2-3, 2015 Double Surcharge of Stamp Sc 7, RFC 363:5-6, 2015 Shifted Surcharges of Sc 7, RFC 365:2-3, 2015 Broken Specimen Legend in 2 Reales Imperforated, RFC 381:1, 2016 Two Plates of the 1945 Airmail Issue 40c Duplicate, RFC 381:2-4, 2016 Die Double Entry on 20c Surcharge of the First Issue, RFC 383:1-2, 2016 1944 Overprint Varieties, RFC 388:1-2, 2016

Varieties in Perforation 1978 Christmas Tax Stamps Perforation Varieties, RFC 001:4, 1979 Founding of Esparza Issue Perforation Varieties, RFC 001:4, 1979 Rotary Issue Perforation Varieties, RFC 001:4, 5:5, 1979 1924 Olympic Games Perforation Varieties, RFC 003:7, 1979 AM Brenes Issue Perforation Varieties, RFC 005:5, 1979 Audit Office Issue Perforation Varieties, RFC 005:5, 1979 Nicoya Annexation Issue Perforation Varieties, RFC 005:5, 1979 Reforestation Issue Perforation Varieties, RFC 007:4, 1980 UPU Centenary Issue Perforation Varieties, RFC 009:11, 1980 Rotary Issue Perforation Varieties, RFC 010:2, 1980 Our Lady of the Angels Issue Perforation Varieties, RFC 015:11, 1980 Women's Year Issue Perforation Varieties, RFC 015:11, 1980 UPU Centenary Issue Perforation Varieties, RFC 016:3, 1980 1979 Ex-Presidents Issue Perforation Varieties, RFC 027:5, 1982 Fauna Issue Perforation Varieties, RFC 029:5, 1982 Bishop Thiel Issue Perforation Varieties, RFC 039:3, 1983 1976 Special Delivery Issue Perforation Varieties, RFC 042:7, 1983 UPU Centenary Issue Perforation Varieties, RFC 046:1, 1983 Population Year Issue Perforation Variety, RFC 047:5, 1984 Central Bank 1965 Issue Perforation Varieties, RFC 053:4, 1984 Perforation Error on 20c Roberto Brenes Issue, RFC 059:1, 1984 Perforation Errors on 50c Birds Issue, RFC 060:2, 1985 1929 Surcharge on Telegraph Stamp (Sc 149d) Imperforated Left, RFC 062:2, 1985 Shifted Perforation on the Soccer Cup Issue, RFC 079:5, 1986 Double Perforation on 1923 Official Stamps, RFC 082:4, 1987 Liberia Issue Perforation Varieties, RFC 096:6, 1988 Natural Resources Issue Perforation Varieties, RFC 101:4, 1989 Shifted Perforations on the 15c Industries Issue, RFC 104:5, 1989 Gold Museum Issue Perforation Varieties, RFC 116:1, 1990 Shifted Perforation on 1926 10c, RFC 116:3, 1990 Perforation Errors of the 55c 1973 Church Issue, RFC 122:1, 1991 Perforation Varieties of 1979 Christmas Tax Stamp (RA82), RFC 146:1, 1993 Double Horizontal Perforation in the 5c Semi Postal Stamp 1924, RFC 154:1, 1993 Perforation Error of Medio Real Second Plate of First Issue, RFC 156:1, 1993 Perforation Error of Medio Real Second Plate of First Issue, RFC 158:2-3, 1994 Churches Issue 1973 Displaced Perforations, RFC 169:2, 1995 Perforation Varieties of 1983 Christmas Tax Stamp, RFC 174:5, 1995 Perforation Varieties of 1965 Blue Christmas Tax Stamp, RFC 175:2, 1995 Shifted Perforations of Sc C467, RFC 197:6, 1997 Shifted Perforations of Sc C924, RFC 198:3, 1997 Perforation Errors of the 1892 Issue, RFC 210:4-6, 1998 Double Perforation of Sc C924, RFC 211:6, 1998 Perforation Errors of 1889 Soto Issue, RFC 218:2-6, 1999 Perforation Errors of 1998 Christmas Tax Stamps, RFC 220:6, 1999 Shifted Perforation on Sc C241, RFC 221:1, 1999 Double Perforation in the First Issue, RFC 222:3-4, 1999 Constant Perforation Variety of 1980 Christmas Stamps, RFC 260:4, 2002 Perforation Errors of 1889 Soto Issue Duplicate, RFC 385:3-5, 2046 Displaced Perforation in 1923-26 Issue, RFC 257:3-4, 2002 Perforation Errors of Cocori Issue (Sc 568) Destroyed, RFC 274:1, 2003 Shifted Perforations in 1923-26 Issues, RFC 371:5-6, 2015 Shifted Perforations in 1923-26 Issues, RFC 371:5-6, 2015

Waterlow Inverted Waterlow Specimen Overprint on Sc 39, RFC 019:3, 1981 File Sheets of the Soto Issue, RFC 065:2-6, 1985 Airmail Imperforated Waterlow Proofs, RFC 066:5-6, 1985 Imperforated Proofs of the 1901 Issue, RFC 070:1-2, 1985 Fiscal Paper Printed by Waterlow Brothers & Layton, RFC 155:2-5, 1993

Way Bills Tobacco and Alcohol Way Bills and the Use of 1883 Postage Stamps, RFC 147:2-5, 1993 1892 Postage Stamps in Way Bills, RFC 149:5-6, 1993 Alcohol Way Bills of the Tempisque Ranch, RFC 152:2-6, 1993 Way Bill from Heredia in 1850, RFC 153:4, 1993 Way Bill from Cartago to Moin 1843, RFC 156:2, 1993 Use of 1883 Issue on Way Bills, RFC 212:2-5, 1998 Way Bills in the Postal Service of the XIX Century, RFC 301:2-6, 2006 Receipt from Post Office 1868, RFC 364:6, 2015