Balancier Limited edition (for white gold version) 33 pieces in white gold Hand-wound movement Four handed display • hours and minutes • small seconds • power-reserve • GREUBEL FORSEY balance wheel system • stop balance Movement Exterior Movement dimensions Case • Diameter : 36.40 mm • In white gold with asymmetrical convex • Thickness : 8.35 mm synthetic sapphire crystal • Transparent back with synthetic sapphire crystal Number of parts • Lateral window with shaped synthetic • Movement: 269 parts sapphire crystal • Three-dimensional, variable geometry-shaped lugs Number of jewels • Raised polished engraving “Balancier” and • 37 “Greubel Forsey” on a hand-punched background • Olived-domed jewels in gold chatons • Gold security screws • Hand-polished bezel, caseband with Chronometric power reserve hand-finished straight graining • 72 hours • Hand-engraved individual number Barrels Case dimensions • Two series-coupled fast rotating barrels • Diameter : 43.50 mm (1 turn in 3.2 hours), one of which is equipped • Height : 13.94 mm with a slipping spring to avoid excess tension Water resistance of the case Balance wheel • Water-resistant 3 atm - 30 m - 100 ft (standard • In-house variable-inertia with 6 gold mean-time NIHS 92-20/SN ISO 22810:2010) screws (12.60 mm diameter) • Stop balance activated by crown Crown • In white gold with engraved Frequency and black lacquered GF logo • 21’600 vibrations/hour Dial side Balance spring • Hour-ring in gold, hand matt lapped, engraved and • Phillips terminal curve black lacquered hour indexes, minute-circle and • Geneva-style stud « Greubel Forsey » • Small second and power-reserve indicators in Main plate gold, engraved and black lacquered, hand matt • Nickel silver, frosted and spotted, straight-grained lapped flanks, nickel-palladium treatment Movement side Bridges • Flat black polished gold plate with raised • Nickel silver, frosted and spotted with polished engraved text, polished bevelling and bevelling and countersinks, straight-grained countersinks, straight-grained flanks with flanks, nickel-palladium treatment apparent gold chatons • Flat black polished and barrel-polished steel • Flat black polished gold central plate, "GF" balance wheel bridge, hand-polished bevelling engraved with individual number, polished and countersinks, straight-grained flanks bevelling and countersinks, straight-grained flanks Gearing • Involute circle profile Hands • Hours and minutes, small seconds and Displays power-reserve in polished blued steel, • Hours and minutes hand-polished countersinks • Small seconds • 72-hours power reserve on a sector Strap and clasp • Hand-sewn alligator • White gold pin buckle, hand-engraved with the GF logo.