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.

Watch

• Ultra-thin mechanical self-winding movement
• Caliber 240 Q

Dial

• Silvery-white opaline, gold applied hour markers

Case

• Rose gold
• Case diameter : 35,1 mm
• Thickness : 8,7 mm
• Water-resistant to 30 m
• Interchangeable solid and sapphire crystal case backs

Gemsetting

• Bezel set with 68 diamonds (~0,68 ct)
• Prong buckle set with 27 diamonds (~0,2 ct)

Strap

• Straps : shiny alligator with square scales, hand-stitched, mink gray (originally fitted) and royal purple (additional strap)
• Prong buckle set with 27 diamonds (~0,2 ct)