Previously owned Patek Philippe Perpetual Calendar gent's watch, Model # 5159J 18kt yellow gold 38mm case with a crocodile leather strap and 18k yellow gold buckle. Silver Opaline, hand guilloche sunburst center dial with Roman and Arabic numeral hour markers. Automatic movement, Patek Philippe Caliber 315 S QR (30 jewels, 21,600vph, 361 parts). Hours, Minutes, Center Sweep Second, Date indication along 8 to 4 arc in dial center. Apertures for day of week at 9, leap year at 12, month at 3 and moon-phase at 6. Sapphire Crystal - Transparent Exhibition Back (below hinged dust cover). Water resistant to 30m / 100ft. Perpetual calendar

　　watch will correctly adjust for short and long months as well as 28/29 days of February once every 4 years.

　　subject to availabilit