Audemars Piguet Perpetual Calendar Ultra-Thin

Audemars Piguet's Royal Oak Perpetual Calendar Ultra-Thin, reference 26586TI.OO.1240TI.01, has a titanium case measuring 41 mm across and just 6.2 mm thick. The blue dial sits under a sapphire crystal and shows the date, day, month and moon phase, all driven by a perpetual calendar mechanism that tracks leap years without correction. This particular version is a limited edition. The self-winding movement is Calibre 5133, visible proportions kept slim thanks to its ultra-thin construction. Day and date sit alongside an astronomical moon phase display, a detail AP builds into this calibre specifically. A titanium bracelet with an AP folding clasp completes the watch, matching the case in both colour and weight. Water resistance is rated to 50 metres.