Audemars Piguet Royal Oak Perpetual Calendar Skeleton

Audemars Piguet Royal Oak Perpetual Calendar Openworked, reference 25829ST.OO.0944ST.01, featuring a classic 39mm case and integrated bracelet constructed from finely satin-brushed and polished stainless steel. The iconic octagonal bezel is secured by eight polished white gold hexagonal screws, framing a breathtaking skeletonized sapphire crystal dial that reveals the highly intricate, hand-finished mechanics of the ultra-thin automatic movement underneath. Four clear sapphire sub-dials with black inscriptions float over the openwork architecture to layout the grand complication: months and leap year indicator at 12 o'clock, date at 3 o'clock, an aventurine-sky moon phase at 6 o'clock accented by a gold "Audemars Piguet" plaque, and day of the week at 9 o'clock.