Greubel Forsey

• cal. GF01 manual winding frosted lever movement, 36 jewels, mono-metallic compensation balance rotating within a 24-second inclined tourbillon carriage • grey dial, eccentric window revealing 24-second inclined tourbillon, fan-form sector for 72-hour power reserve indication, subsidiary dial for constant seconds • large circular case in platinum, down-turned lugs, lateral window with convex sapphire crystal to the band at 8 o'clock, sapphire crystal display back secured by six screws • case, dial and movement signed • with a platinum Greubel Forsey buckle

The movement is running at the time of cataloguing. The dial and case are in excellent condition, it seems as though the watch has not been worn. The watch was not tested for the accuracy of time or duration of the power reserve and may need service at the buyer's discretion. Please note that Sotheby's does not guarantee the future working of the movement.
"In response to your inquiry, we are pleased to provide you with a general report of the condition of the property described above. All dimensions in catalogue descriptions are approximate. Condition reports may not specify mechanical replacements or imperfections to the movement, case, dial, pendulum, separate base(s) or dome. Watches in water-resistant cases have been opened to examine movements but no warranties are made that the watches are currently water-resistant. Please note that we do not guarantee the authenticity of any individual component parts, such as wheels, hands, crowns, crystals, screws, bracelets and leather bands, since subsequent repairs and restoration work may have resulted in the replacement of original parts. Since we are not professional conservators or restorers, we urge you to consult with a restorer or conservator of your choice who will be better able to provide a detailed, professional report. Prospective buyers should inspect each lot to satisfy themselves as to condition and must understand that any statement made by Sotheby's is merely a subjective, qualified opinion. Prospective buyers should also refer to any Important Notices regarding this sale, which are printed in the Sale Catalogue. In particular, please note it is the purchaser's responsibility to comply with any applicable import and export matters, particularly in relation to lots incorporating materials from endangered species.NOTWITHSTANDING THIS REPORT OR ANY DISCUSSIONS CONCERNING A LOT, ALL LOTS ARE OFFERED AND SOLD AS IS" IN ACCORDANCE WITH THE CONDITIONS OF BUSINESS PRINTED IN THE SALE CATALOGUE."

**Please be advised that bands made of materials derived from endangered or otherwise protected species (i.e. alligator and crocodile) are not sold with the watches and are for display purposes only. We reserve the right to remove these bands prior to shipping."

This particular “Greubel Forsey Tourbillon 24 Seconds Incliné" is a prototype. 

According to our knowledge only a few prototypes have been manufactured, this particular one bears the number 3 and one can notice the engraving "PROTO 3" on the dial.

The movement of this watch incorporates a tourbillon inclined at a 25° angle and performs a 24-second revolution, which is considerably faster in comparison to more traditional one-minute tourbillons.

Special low-density alloys such as Avional and titanium, which are employed in the aeronautical industries, were used for the tourbillon. This enables the tourbillon carriage to overcome the stress imposed by the high rotation velocity. The tourbillon cage alone is comprised of 87 parts and yet weighs just 0.39g. 

The asymmetrical design of the case and dial gives the watch an attractive twist. The additional curved sapphire crystal set to the side of the case opens the view to the tourbillon carriage and one can fully appreciate the tourbillon in action.

Sotheby's is honoured to work in cooperation with Greubel Forsey, providing the new owner with a complete and complimentary service of the watch from an official Greubel Forsey retailer. This includes the update of the owners book and renewal of the two year owners warranty. In addition the leather strap may be replaced and fitted for their usage. Any additional terms and conditions of this unique offer is available upon request.