Audemars Piguet Perpetual Calendar

Audemars Piguet's Perpetual Calendar, reference 26394BC.OO.D027KB.01, has a 41 mm case in white gold. The case is fitted with a sapphire crystal over a blue dial. Inside is the self-winding calibre 5134, a perpetual calendar movement with moon phase, month, date and weekday indications. The perpetual calendar tracks leap years without correction, and the moon phase display fills out the dial's blue tones. A blue rubber strap closes with a folding clasp in matching white gold. The construction stays modest in depth despite the movement's complexity, and water resistance is limited: the case is rated to 30 metres.