• cal. 28-20/220 10-day nickel lever movement stamped with the seal of Geneva, 29 jewels set in gold chatons, Gyromax balance • silvered dial, applied yellow gold dart indexes and Arabic numerals, yellow gold dauphine hands, subsidiary dials for seconds and circular 10-day power reserve indication at 12 o'clock • 18k yellow gold rectangular flared case, sapphire crystal display back secured by 4 screws • case, dial and movement signed • with an 18k yellow gold Patek Philippe buckle

Please note that the movement has not been checked for timekeeping accuracy and Sotheby's will not be held responsible for any repairs should they be require. Movement is in working order while cataloguing. Dial in good condition. Case with signs of moderate wear, small dent to the band. Screws holding the case back are marked by the screwdriver tool.
"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."

Reference 5100 is historically significant in the development of Patek Philippe complication wristwatches. Incorporating dual main spring barrels, it is the first 10-day wristwatch ever made by the company. Inspired by the classic Patek Philippe reference 2554 from the year 1952, the reference 5100 is housed in a spectacular flared sided case which echoes the fluid lines of a manta ray. In fact, a manta ray was used in the reference's promotional material to emphasize its similarity. With a sapphire crystal case back, the chronometer rated movement is clearly visible from the back of the watch. The reverse of the watch is engraved 'Year 2000', a reference to its introduction as a commemorative piece to celebrate the beginning of the third millennium. Immediately popular with collectors and enthusiasts alike, the watch was voted best wristwatch by the Robb Report in 2000. Produced in a limited series, a total of 1500 pieces were made in yellow gold.