Audemars Piguet Perpetual Calendar

The Audemars Piguet Royal Oak Perpetual Calendar 26579CS.OO.1225CS.01 has a 41mm octagonal case in blue ceramic, paired with a matching ceramic bracelet, measuring 9.5mm thick. The blue Grande Tapisserie dial displays hours, minutes, moon phases and a perpetual calendar, protected by a glareproofed sapphire crystal. It is powered by the self-winding Calibre 5134, offering a 40-hour power reserve, and the case is water resistant to 20 metres.