Important Modern & Vintage Timepieces

Geneva, Nov 08, 2014

LOT 359

GREUBEL FORSEY DOUBLE TOURBILLON 30° VISION WHITE GOLD Greubel Forsey, La Chaux-de-Fonds, Swiss, Inventor Watchmakers, "Double Tourbillon 30° Vision", No. 24, movement No. 0598, case No. 00 574. Sold on Chritmas 2004. Extremely fine and rare, important, large and heavy, water-resistant, 18K white gold wristwatch with 30° inclined visible inner one minute tourbillon regulator, visible outer four-minutes tourbillon regulator with four minutes rotation indicator, twin barrels, 72-hour power reserve and a Greubel Forsey buckle. Accompanied by the user manual/guarantee.

CHF 120,000 - 180,000

HKD 1,000,000 - 1,500,000 / USD 125,000 - 188,000

Sold: CHF 195,750

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, convex sapphire crystals. Silvered 18K gold secured with four blued steel screws, applied white gold graduated Roman numerals and baton indexes, subsidiary dial for the seconds at 9, power-reserve indication at 3, four minute tourbillon indication between 5 and 7, outer minute division with every five Arabic numerals, aperture for the tourbillions. Blued steel skeletonized hands, flame-blued polished steel four minute fancy four-armed arrow hand on the tourbillon cage. 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 oscillations per hour, self-compensating balance spring with Phillips terminal curve, outer four minute tourbillion under a polished conical hand-finished bridge.


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Grading System
Grade:
Case: 2

Very good
Movement: 1*

As new

Overhaul recommended, at buyer's expense
Dial: 1-01

As new

HANDS Original

Notes

Dial, case and movement signed. DIAM. 43.5 mm. THICKNESS 16 mm. GREUBEL FORSEY In 1999, after working together for nearly 20 years, Robert Greubel and Stephen Forsey joined forces and began developing a new generation of tourbillons specifically designed to improve timekeeping in mechanical watches. In 2004, they unveiled Greubel Forsey and released their Double Tourbillon 30° after four years of research and development. The Double Tourbillon 30° features a tourbillon within a tourbillon, a technical milestone in watchmaking history. A one minute tourbillon carriage rotates inside a larger four minute carriage inclined at a 30° angle, giving the watch its name. The main characteristic of their innovative design is the 30° inclination of the interior cage rotation axis which creates optimal conditions for the balance wheel. In this premier construction, the double off-set tourbillons continually compensate for gravity- induced errors on the oscillator in all positions, allowing for superior chronometric performance. The Double Tourbillon 30° features an open dial allowing the innovative double-axel tourbillon mechanism to be viewed and appreciated.