AUDEMARS PIGUET ROYAL OAK PERPETUAL CALENDAR SKELETON REF. 25829PT IN PLATINUM - From 2009 Reference N° 25636PT Serial N° F59308 N. 214 Year: 2009 Material: Platinum Weight: 230g Dimensions: 39mm Caliber: Automatic Crystal: Sapphire Bracelet: Platinum Accessories: Original box, guarantee and keys. Produced between the late 1990s and early 2000s, the Royal Oak Perpetual Calendar ref. 25829PT represents one of Audemars Piguet's most refined interpretations of the classic complication. According to collectors' estimates, only approximately 156 pieces of the reference 25829 were ever made in platinum, a testament to its absolute rarity. This skeletonized version combines the purity of the Royal Oak design with the complexity of the ultra-thin automatic caliber 2120/2800, visible from both sides.This Piece no. 214 is in excellent condition and preserved by the family of its first owner. Adding to its rarity are its accessories: certificate of origin, presentation box, labels, VHS manual, and pens for changing the calendar. A unique opportunity to find an item of such rarity, preservation, and provenance.