Limited Edition of 11 Pieces
The case, in platinum, measures 44mm x 15.9mm. It has high domed sapphire crystals, and it is water resistant to 30 meters. Three-dimensional, variable geometry-shaped lugs. Raised polished engraving "Edition Historique" and "Greubel Forsey" on a hand-punched background. Gold security screws. Polished bezel, caseband with hand-finished straight graining. Platinum plates, engraved, hand-finished with texts, screwed to the caseband. Hand-engraved individual number.
Movement is a Swiss hand-wind Greubel Forsey in-house caliber with 50 jewels, 21,600 vph and a power reserve of 3 days. Olived-domed jewels in gold chatons. Two series-coupled fast-rotating barrels (1 turn in 3.2 hours), one of which is equipped with a slipping spring to avoid excess tension. Variable-inertia balance wheel with white gold mean-time screws (10.70 mm diameter). Balance spring with Phillips terminal curve and Geneva-style stud.
Main plate in titanium, frosted and spotted, with polished bevelling, blue finish. Bridges in Nickel silver, frosted and spotted with polished bevelling and countersinks, straight-grained flanks, nickel-palladium treatment. Titanium plates with polished relief-engraved text, polished bevelling and countersinks. Founders' signature in relief by galvanic growth. Flat black polished steel tourbillon bridges, hand-polished bevelling and countersinks, straight-grained flanks.
Inner tourbillon: inclined at a 30° angle, 1 rotation per minute, outer tourbillon: 1 rotation in 4 minutes. Hand-bevelled and openworked cage pillars with gold counterweight. Involute circle profile gearing. Conical gearing with profiled teeth. Functions are: hours, minutes on demand on disc, small seconds and sectorial power reserve
It has a multi-level dial in titanium, dome-shaped. Hour-ring with lacquered indeces, relief-engraved texts. Metallised synthetic sapphire shutter, hiding or revealing the minutes display. Small seconds indicator in gold, engraved and lacquered, hand matte lapped. Power-reserve indicator in titanium with relief-engraved scale. Hands: hours (red triangle), small seconds in polished blued steel, hand-polished countersink, Power-reserve in polished blued steel.
It comes on a hand-sewn alligator leather strap with a platinum folding clasp, hand-engraved with the GF logo.
Thanks.