Patek Philippe 5159J - Grand Complications
In order to accommodate months with 28, 30 and 31 days, as well as February 29th during leap years, a movement must have a mechanical "memory" of four years - or 1,461 days. A highly sophisticated mechanism is required for this type of function, one that is based on a complex system of levers and cams pivoting around their axes. This is an area of expertise in which Patek Philippe has repeatedly established its long-standing efficiency.
Ultra-thin mechanical self-winding movement. Caliber 240 Q. Day, date, month, leap year and 24-hour indication by hands.
Royal blue sunburst, gold applied Breguet numerals.
White gold. Interchangeable full back and sapphire-crystal case back. Water resistant to 30 m. Case diameter: 39 mm. Height: 9.71 mm.