Audemars Piguet 5135

The caliber 5135 is an in-house automatic movement by Audemars Piguet with a diameter of 29 mm and 38 jewels. It operates at a frequency of 19,800 vibrations per hour, features a perpetual rotor with automatic bidirectional winding, and offers a power reserve of 40 hours. The movement includes a perpetual calendar with date, day, month, and moon phase functions, and powers the model 26585.