Audemars Piguet Perpetual Calendar Openworked "Cactus Jack"

Audemars Piguet's Royal Oak Perpetual Calendar Openworked "Cactus Jack", reference 26585CM.OO.D301VE.01, has a 41 mm case in brown ceramic. The case measures 9.9 mm thick. A sapphire crystal covers the openworked dial, which exposes the skeletonized movement beneath. The self-winding calibre 5135 drives the perpetual calendar, tracking date, weekday, month and moon phase without correction until the next century. This is a limited edition of 200 pieces. The watch is fitted to a brown calfskin strap with a folding clasp finished in pink gold. Water resistance is a modest 20 metres, in keeping with its dress orientation rather than sport use.