Gents Patek Philippe 18K yellow gold watch, Ref# 3940j on Original Patek strap with 18K yellow gold deployant buckle, solid & sapphire display casebacks, case diameter 36mm. Self-winding movement with perpetual calendar and moon phases, day, date, month, leap year and am/pm indicators. Silver dial with registers for day and date and month and moon phases with leap year indicator and bicolored day/night indicator. Winding box, stylus, and papers dated June 1998. Pristine condition.