Dial: silvered, guilloché center fieldCaliber: cal. 324/206 automatic movement, 34 jewelsMovement number: 3423345Case: 18k yellow gold, screw down sapphire display backCase number: 4296299Closure: 18k yellow gold Patek Philippe buckleSize: length 51 mm, width 39 mmSigned: case, dial and movementAccessories: Patek Philippe presentation box with outer packaging, Extract from the Archives confirming the date of sale on August 30, 2005, Certificate of Origin, leather bi fold, booklets and pusher

CASE Case in overall excellent condition with light stop wear. Some light surface scuffs. DIAL Dial in excellent condition. MOVEMENT Calendar function operating. The movement is running at time of cataloging, however it was not tested for the accuracy of time or duration of the power reserve and may need service at the buyer's discretion. Please note that Sotheby's does not guarantee the future working of the movement. ***Please be advised that the bands on this watch are made of materials derived from endangered or otherwise protected species (i.e. alligator and crocodile) and thus not sold with the watch, they are for display purposes only. We will remove these bands prior to international shipping.***
"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 Ref. 5135 represents Patek Philippe's continuous desire to improve upon its own iconic contributions to horology. The tonneau-form dial differs from the previous circular annual calendar, and honors the firm's case designs from the Art Deco period. Rather than displaying the date in registers, the day of week, date, and month appear in three apertures arranged in an arc between 10 and 2 o'clock. The Ref 5135 is powered by the in-house caliber 324, and was the first wristwatch to automatically advance the month, day and date.