The Royal Oak Perpetual Calendar Openworked “Cactus Jack” Limited Edition of 200 pieces is crafted in brown ceramic—a first at Audemars Piguet—and enhanced by components endowed with green or blue luminescent coating. CASE: MATERIAL: Brown ceramic WATER RESISTANCE: 20 m SIZE; 41 mm DIAL: Sapphire dial, smoked external zones of the counters, brown applied hour-markers and Royal Oak hands with luminescent coating, brown inner bezel. BRACELET: Brown calfskin strap with special pink gold folding clasp. CALIBRE 5135: FUNCTIONS: Perpetual calendar with week indication, day, date, astronomical moon, month, leap year, hours and minutes. NUMBER OF JEWELS: 38 MECHANISM: Selfwinding POWER RESERVE: 40 h TOTAL DIAMETER: 29 mm NUMBER OF PARTS: 374 FREQUENCY: 2.75 hz 19800 vph THICKNESS: 4.5 mm