GREUBEL FORSEYDOUBLE TOURBILLON 30° WITH 120 HOUR POWER RESERVEVARIOUS PROPERTIES

GREUBEL FORSEY. AN EXCEPTIONALLY FINE AND RARE 18K WHITE GOLD SEMI-SKELETONISED INCLINED DOUBLE TOURBILLON WRISTWATCH WITH POWER RESERVE

SIGNED GREUBEL FORSEY, DOUBLE TOURBILLON 30° MODEL, NO. 83, MOVEMENT NO. 0693, CASE NO. 00636, CIRCA 2008

Price realised HKD 1,125,000

Estimate

HKD 800,000 – HKD 1,200,000

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GREUBEL FORSEY. AN EXCEPTIONALLY FINE AND RARE 18K WHITE GOLD SEMI-SKELETONISED INCLINED DOUBLE TOURBILLON WRISTWATCH WITH POWER RESERVE

SIGNED GREUBEL FORSEY, DOUBLE TOURBILLON 30° MODEL, NO. 83, MOVEMENT NO. 0693, CASE NO. 00636, CIRCA 2008

Price realised HKD 1,125,000

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GREUBEL FORSEY. AN EXCEPTIONALLY FINE AND RARE 18K WHITE GOLD SEMI-SKELETONISED INCLINED DOUBLE TOURBILLON WRISTWATCH WITH POWER RESERVE
SIGNED GREUBEL FORSEY, DOUBLE TOURBILLON 30° MODEL, NO. 83, MOVEMENT NO. 0693, CASE NO. 00636, CIRCA 2008
Movement: Cal. GF02, manual, 39 jewels, signed
Dial: Aperture with inner tourbillon inclined at a 30° angle rotating once every 60 seconds, outer tourbillon rotating once every 4 minutes, signed
Case: Glazed display back secured by 6 screws, 43 mm. diam., signed
With: 18k white gold Greubel Forsey double deployant clasp. Certificat de grand service dated 22 August 2008 and undated Owner’s book, Greubel Forsey Extrait du Grand Livre and Certificat de Grand Service. This certificate is valid during six months following the date of acquisition of the watch at Christie’s, offering the new owner a free servicing (but not exceeding 10,000 CHF of the retail service price) of the present watch in Greubel Forsey’s workshops, subject to conditions published on the back of the Certificate.

> Some watches are pictured with straps made of endangered or protected animal materials such as alligator or crocodile. These endangered species straps are shown for display purposes only and are not for sale. Christie’s will remove and retain the strap prior to shipment from the sale site. At some sale sites, Christie’s may, at its discretion, make the displayed endangered species strap available to the buyer of the lot free of charge if collected in person from the sale site within 1 year of the date of the sale. Please check with the department for details on a particular lot. > Prospective purchasers are advised that several countries prohibit the importation of property containing materials from endangered species, including but not limited to coral, ivory, tortoiseshell and crocodile. Accordingly, prospective purchasers should familiarize themselves with relevant customs regulations prior to bidding if they intend to import this lot into another country.

Celebrated as Greubel Forsey's '1st fundamental invention', the Double Tourbillon 30° Vision, so-called because of the angle that links the two mobile cages is a patented double tourbillon system representing a decisive technical advance and milestone in watchmaking history which took more than four years of research and development to perfect. Inside the exterior tourbillon which turns in a four-minute period, an interior tourbillon, smaller in size and inclined at 30 degrees in relation to the first cage, revolves in 60 seconds. To guarantee even more perfect time-keeping, this revolutionary complication permanently compensates the rate of gravity-related errors in all positions. This astounding timepiece is also equipped with twin barrels fitted with a slipping spring so as to avoid excess winding tension, as well as a conical gearing with profiled teeth for optimal power transmission.

Patented by Abraham Louis Breguet in 1801, the tourbillon is a device created to compensate the effects of gravity on the movement. This is achieved by averaging out the variations of rates for a calibre in different positions by rotating the entire escapement, balance, spring, lever and escape wheel, through 360 degrees over a fixed period of time.

A question which has always been asked by connoisseurs of fine watchmaking is, does a tourbillon, for all its beauty and animation, genuinely increase the accuracy of a watch? The Double Tourbillon 30° Technique successfully answered this question when in 2011 it won the Concours International de Chronométrie with an incredible score of 915 points out of 1000, the highest in the competition to date.

The present watch offers an incredibly rare opportunity to acquire one of the most exciting examples of contemporary haute horologerie and a most impressive trophy for those who hold the endless pursuit of excellence in the highest regard.

Robert Greubel and Stephen Forsey have become legends in the world of modern independent watchmaking, the timepiece offered here is the perfect encapsulation of their success.

Working together since 1992, when they were developing complicated movements for Renaud & Papi, Greubel and Forsey decided to branch out on their own in 1999, setting up as the independents, CompliTime Greubel, la Neuveville and Bureau d’Etude et Prototypy, le Locle, respectively. From this moment forward, they are focused on designing a new generation of tourbillons specifically developed to improve the timekeeping of the mechanical watch.

Brought to you by

Yvonne Yu

YvonneYu@christies.com +852 2978 9920

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