Audemars Piguet 4309

Cal. 4309 is Audemars Piguet's in-house automatic movement introduced in 2019 as a true no-date variant of the 4302. It contains 225 components, 32 fewer than its sibling, while maintaining the same 70-hour power reserve. The movement belongs to the 43xx caliber family and remains in production, used in Royal Oak and Code 11.59 references without a date window.