Royal Oak Perpetual Calendar Openworked Watch

Black ceramic case with a black ceramic bracelet. Fixed black ceramic bezel. Skeleton dial with gold-tone hands and index hour markers. Week number markers around the outer rim. Dial Type: Analog. Perpetual calendar. Four sub-dials displaying: date, day, month/leap year and moonphase.and has a power reserve of approximately 40 hours. Scratch resistant sapphire crystal. Screw down crown. Transparent case back. Octagon case shape, case size: 41 mm, case thickness: 9.9 mm. Butterfly clasp. Water resistant at 20 meters / 65 feet. Functions: perpetual calendar, moon phase, leap year, month, date, day, hour, minute, second. Additional Info: boutique exclusive. Royal Oak Series. Luxury watch style. Watch label: Swiss Made. Audemars Piguet Royal Oak Perpetual Calendar Openworked Watch 26585CE.OO.1225CE.01.