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.
Mechanical self-winding movement.
324 S QR.
Perpetual calendar with retrograde date hand.
Day, date, month, leap year in apertures.
Center sweep second hand.
Dial: silvery opaline, gold applied hour markers.
Alligator strap with square scales, hand-stitched, shiny chocolate brown, fold-over clasp.
Case: rose gold.
Interchangeable full back and sapphire-crystal case back.
Water resistant to 30 m.
Case diameter: 39.5 mm.
Height: 11.19 mm.
Price: 75'000 CHF *