Important Collectors’ Wristwatches, P...

Geneva, Nov 16, 2008

LOT 703

Double Tourbillon 30° Vision Greubel Forsey, Inventeurs Horlogers, ?Double Tourbillon 30° Vision?, movement No. 0580, No. 16, case No. 00566. Made in the 2000s. Extremely fine and rare, important, heavy, water-resistant, 18K white gold wristwatch with 30° inclined visible inner oneminute tourbillon regulator, visible outer four-minutes tourbillon regulator with four minutes rotation indicator, twin barrels, 72-hour power reserve and an 18K white gold Greubel Forsey double deployant clasp.

C. Three-body, solid, polished and brushed, stepped bezel, 3 dimensional, variable geometry-shaped lugs, spiral of infinity hand-engraved decorated band, transparent case back with 6 screws, engraved with black lacquered GF logo crown, convex sapphire crystals. D. Black gold securized with four blued steel screws, applied white gold graduated Roman numerals and baton indexes, subsidiary dial for the seconds at 9, power-reserve indication between 2 and 4, four minute tourbillon indication between 5 and 7, outer minute division with every five Arabic numerals, aperture for the tourbillions. White gold skeletonized hands, flame-blued polished steel four minute fancy four armed arrow hand on the tourbillon cage. M. Cal. GF02, frosted nickel silver finished in ?jade gold?, 39 jewels, lateral lever escapement , inner 30° inclined one-minute tourbillon, three-arm monometallic balance with white gold mean time screws beating at 21.600 vibrations/hour, self-compensating balance spring with Phillips terminal curve, outer four minute tourbillion under a polished conical hand finished bridge. Dial, case and movement signed. Diam. 43.5 mm. Thickness 16 mm.