Audemars Piguet Royal Oak Offshore Perpetual Calendar Platinum A super exclusive masterpiece of haute horology, this Audemars Piguet 26209PT features a 42mm platinum case and a stunning blue dial. Powered by the AP caliber 2326/2839, it offers a perpetual calendar, chronograph, and moon phase. The luxurious blue alligator strap enhances its exclusivity. A true collector’s piece, combining innovation and elegance.