cal. 28-20 222 rectangular nickel lever movement stamped with the Geneva seal, 29 jewels of which 6 are set in gold chatons, one-minute tourbillon carriage, Gyromax balance, adjusted to heat, cold, isochronism and 5 positions • pink champagne dial, applied Breguet numerals, feuille hands, subsidiary seconds, 10-day power reserve register •  large polished rectangular case with double-stepped sides, chamfered ends, diamond accent between the lugs at 6, sapphire crystal display back secured by four screws •  case, dial and movement signed •  with a platinum PP buckle

Rare and Collectable! Manual winding movement running while cataloguing, tourbillon appears operational while cataloguing. Dial looks lovely and clean. Case with only a few minor light scuffs to the case band, but hardly noticeable and can be polished easily. Movement numbered 3361048. Case number 4257220. **The leather strap of this watch is made from 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.

Important Notice regarding importation into the United States of Rolex watches
Sotheby's cannot arrange for the delivery of Rolex watches to the United States because U.S. laws restricts the import of Rolex watches. The buyer or a designated agent may collect the property in the country of sale."

Accompanied by a Patek Philippe Certificate of Origin, C.O.S.C certificate, instructions, within a maroon leather folder.  Further accompanied by a presentation case with outer card box. 

Patek Philippe launched this model, the 5101, in 2003 as a tribute to a rectangular tourbillon wristwatch movement produced from 1956-1957. See Huber & Banberry, Patek Philippe Pocket Watches, Vol. 1, Second Edition, pp. 178-179. The refinement and elegance of the present watch comes from the combination of two rare complications: a 10-day power reserve and a tourbillon. Patek Philippe produces roughly 15-20 examples of this model each year. According to our research, the present example is one of only six to have ever appeared at auction.

Under the dial , the REF. 5010 is a technological powerhouse. Launched in 2003, it took three years for Patek Philippe watch engineers to develop a new tourbillon movement. To prevent the minute wheel from obstructing the view of the tourbillon, the entire going train was relocated to the dial side. The tourbillon is now showcased on the bridge side as the dominant element and is beautifully revealed through the sapphire crystal display back. The rotating cage alone is composed of 72 miniscule individual parts, and only weighs 0.3 grams.

The heart of this timepiece is powered by two tandem mainspring barrels providing 10-day power reserve indication. Both mainspring barrels are wound simultaneously in order to gather up the energy required for the 10-day power reserve. The larger barrel is wound directly and transfers power to the smaller barrel. The first barrel is equipped with a system containing a slipping bridle, which prevents both mainsprings from being over-wound and disengages the barrels when they have reached their wounding limit. It takes a Patek Philippe watchmaker up to 3 months to produce REF. 5010 from beginning to the end.