GREUBEL FORSEY | VERY FINE AND RARE LIMITED EDITION PLATINUM QUADRUPLE TOURBILLON WRISTWATCH WITH POWER RESERVE INDICATIONNO 38 QUADRUPLE TOURBILLON CIRCA 2010

Movement: cal. GF03 manual winding, 63 jewelsCase: platinum, sapphire crystal display back secured by 6 screwsBracelet/Clasp/Buckle: platinum Grebuel Forsey folding claspSize: 43.5 mm diameterSigned: case, dial and movement

The movement is in working condition at the time of cataloguing. The dial and hands are in very good condition with only a few very light surface scratches, little sign of nicks to the lugs. Overall in very good condition.* Please note that the movement has not tested for the accuracy of time or duration of the power reserve and a service might be required at the buyer's expense.**The strap of this wristwatch is made from an endangered species, please refer to important notices for further information.**
"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."

The revolutionary Quadruple Tourbillon demonstrates the firm's drive to continually innovate in the field of precision timekeeping. The watch employs four different tourbillons rotating in two double tourbillon cages. The two interior tourbillons rotate every 60 seconds at at 30° angle, and the two exterior rotate every four minutes.  The 30° angle of the interior tourbillons prevents them from ever staying in a completely horizontal or vertical position, which helps eliminate the most extreme variations in rate.   The asymmetrical dial provides an elegant display to view both tourbillon cages. This effect is achieved by the use of transparent sapphire bridges between the exterior and interior tourbillons. The two double tourbillon systems are joined by a differential mechanism, so if one escapement briefly passes through a horizontal or vertical position, the other one, rotating at an angle will offset that, leading to more precise timekeeping.  

The firm produces less than ten Quadruple Tourbillons a year, making the present lot not only an exceptional piece of horological artistry, but also extremely rare.