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, month, leap year in apertures.
Sweep seconds hand.
Opaline-white dial, hand-guilloched center.
Case: yellow gold.
Sapphire-crystal case back protected by a hinged dust cover.
Water resistant to 30 m.
Case diameter: 38 mm.
Height: 11.8 mm.
Price: 81'600 CHF *