Dial: silvered Calibre: cal. 12-400 manual winding, 18 jewels Movement number: 729'409 Case: 18k yellow gold, snap-on back Case number: 309'765 Closure: Patek Philippe crocodile strap and 18k yellow gold buckle Dimensions: 35 mm Signed: case, dial and movement Accessories: Patek Philippe Extract from the Archives confirming date of sale on September 8th, 1961

MVT: is running at the time of cataloguing. CASE: in very attractive condition with incredibly sharp case lines and crisp hallmark on the band. There is some oxidation visible mainly around the crown and there is wear visible with the naked eye throughout. DIAL: in attractive honest condition with some spotting and other minor blemishes visible with the naked eye. Please note that the movement has not been tested for the accuracy of time and may need a service at the buyer's expense. Sotheby's does not guarantee the future working of the movement and we do not guarantee the authenticity of any individual component parts since subsequent repairs and restoration work may have resulted in the replacement of original parts. You are advised that watch straps or bands made of materials derived from endangered or otherwise protected species (i.e. alligator or crocodile) are not sold with the watch and we reserve the right to remove these straps or bands prior to shipping. Furthermore, the watch may not come with its original manufacturers strap or band. Prospective bidders should review the Conditions of Business, Authenticity Guarantee, the Guide for Prospective Buyers, and any Important Notice in the sale catalogue.
"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."

Production of reference 2597 HS (Heures Sautantes) began in 1958 after Louis Cottier's 1953 prototype. Patek Philippe patented the model in 1959 with specially designed pushers to the left band that enable the wearer to advance and retard the hour hand in one hour increments, thereby easily adjusting the watch for different time zones.

The first version of was equipped with a single hour hand, such as the present lot, while later versions had a second hour hand indicating 'home' time whenever the wearer would be travelling in a different time zone. Overall an estimated total of just under 100 pieces were ever produced before both versions were discontinued in 1977.

The present watch has furthermore been retained in very appealing original condition.