Patek Philippe

• cal. 19''' manual winding rhodium-plated counterpoise lever escapement movement, 29 jewels, mono-metallic balance with peripheral timing screws and blued Breguet balance spring with terminal curb, wolf's tooth winding mechanism, swan neck micrometre regulation system, two polished hammers repeating on two gongs • silvered dial, applied gold baton numerals, aperture for month, date and day in English, subsidiary dial indicating constant seconds combined with moon-phases, gold dauphine hands • 18k white gold case, stepped bezel, squared stepped bow, snap-on back • case, dial and movement signed 

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 very good condition. Case in very good condition except for slightly scuffs due to the knife near the lip. Overall in very good condition.
"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 watch may represent one of only two models of this reference in white gold. At the present time, the whereabouts of a second example is publicly unknown.

Bearing a full digital display of day, month and date held within a single aperture, the dial of this watch is an especially rare Patek Philippe design; the majority of perpetual calendar pocket watches by Patek Philippe were made with subsidiary dial indications. The 'single aperture' dial design enhances the clarity and ease of reading the date display and is of a type more commonly associated with wristwatches. With the sharp, clear lines of the case, the overall effect emphasises the watch's purpose as a highly accurate timekeeper.   

The case was made by Antoine Gerlach.

A very similar watch is illustrated in Huber, M., and Banbery, A., Patek Philippe, 1982, p.228 and Patek Philippe Museum by Patek Philippe 2014 edition, volume 1 p. 386-387.