PATEK PHILIPPE GRAND COMPLICATIONS 5159R-001 PERPETUAL CALENDAR ROSE GOLD MEN’S WATCH
Patek Philippe Grand Complications 5159R-001 Perpetual Calendar With Retrograde Date Hand 38mm 18K rose gold case, hinged dust covered sapphire crystal back, hand-guilloched dial, self winding perpetual calendar caliber 315 S QR movement with day, retrograde date, month, moon phase, leap year indications, and sweep second hand, approximately 48 hour of power reserve, leather strap with fold-over buckle. Water resistant to 30 meters.
In order to accommodate months with 31, 30 and 28 days, and february 29 in leap years, a movement must have a mechanical “memory” of four years – or 1,461 days. This function requires a highly sophisticated mechanism, based on a complex system of levers and cams pivoting around their axes. This is a domain in which Patek Philippe has repeatedly leveraged its long-standing competence.