Audemars Piguet Selfwinding Perpetual Calendar

Audemars Piguet's Royal Oak Selfwinding Perpetual Calendar, reference 26674CD.OO.1225CD.01, comes in a 41 mm ceramic case. The case measures 4.1 mm thick and carries the deep "Bleu Nuit" colour through the material itself. A sapphire crystal covers the blue dial. Inside is the self-winding calibre 7138, visible proof of Audemars Piguet's own manufacture movement. The perpetual calendar tracks date, month and weekday together, and a moon phase display sits within the same mechanism. This is a perpetual calendar watch built to run without correction across leap years. The integrated ceramic bracelet closes with a titanium folding clasp. Water resistance is rated to 50 metres.