BRAND : Audemars Piguet MODEL : Royal Oak Selfwinding Chronograph MODEL NUMBER : 26320BA.OO.1220BA.01 CASE : Yellow gold case, glareproofed sapphire crystal, screw-locked crown CASE SIZE : 41 mm WATER RESISTANCE : 50 m DIAL : White dial with “Grande Tapisserie” pattern, White counters, yellow gold applied hour-markers and Royal Oak hands with luminescent coating CALIBRE : SELFWINDING CALIBRE 2385 MECHANISM : Selfwinding POWER RESERVE : 40 hours FUNCTIONS : Chronograph, hours, minutes, small seconds and date.