Audemars Piguet Royal Oak Perpetual Calendar “Blue”

41mm stainless steel case, 9.5mm thick, glareproof sapphire crystal back, screw-locked crown, glareproofed sapphire crystal, Blue dial with “Grande Tapisserie” pattern, white gold applied hour-markers, and Royal Oak hands with luminescent coating, Calibre 5134 perpetual calendar automatic movement with week indication, day, date, astronomical moon, month, leap year, hours and minutes, approximately 40 hours of power reserve, stainless steel bracelet, AP folding buckle. Water resistant to 20 meters.