Audemars Piguet Royal Oak Perpetual Calendar Openworked "Cactus Jack" Ref. 26585CM.OO.D301VE.01 The Audemars Piguet Royal Oak Perpetual Calendar Openworked "Cactus Jack" ref. 26585CM.OO.D301VE.01 has a 41 mm brown ceramic case and the self-winding Calibre 5135. - Self-winding Calibre 5135, 40 h power reserve - Functions: perpetual calendar with week indication, day, date, astronomical moon, month, leap year, hours and minutes - Case: brown ceramic case, glareproofed sapphire crystal and brown ceramic caseback, screw-locked crown. Diameter 41 mm, thickness 9.9 mm, water resistant to 20 m - Dial: sapphire dial, smoked external zones of the counters, brown applied hour-markers and Royal Oak hands with luminescent coating, brown inner bezel - Brown calfskin strap with special pink gold folding clasp Full set. Maker: Audemars Piguet. Reference: 26585CM.OO.D301VE.01. Available through ELITA's private desk — verification review, discreet handling and storage. Price on request.