Audemars Piguet Royal Oak Perpetual Calendar Watch - 26574OR.OO.1220OR.01 8K it features a screw-down back

it features a screw-down back and crown fortified by a triplock triple waterproofness system

caliber 52850 pellaton automatic winding movement with power reserve display

42 mm 18K red gold case

calibre 35100 automatic movement with date

Audemars Piguet Royal Oak Perpetual Calendar Watch - 26574OR.OO.1220OR.01 8K it features a screw-down back41 mm 18K pink gold case, 9. 5 mm thick, glareproofed sapphire crystal back, screw locked crown, glareproofed sapphire crystal, silver toned dial with Grande Tapisserie pattern, pink gold applied hour markers and Royal Oak hands with luminescent coating, silver toned inner bezel, Manufacture 5134 selfwinding movement with perpetual calendar with week indication, day, date, astronomical moon, month, leap year, hours and minutes, approximately 40 hours