Audemars Piguet Royal Oak Perpetual Calendar Ref. 26607BA.OO.1220BA.01 The Audemars Piguet Royal Oak Perpetual Calendar ref. 26607BA.OO.1220BA.01 has a 41 mm yellow gold case and the self-winding Calibre 5134. - Self-winding Calibre 5134, 40 h power reserve - Functions: perpetual calendar with week indication, day, date, astronomical moon, month, leap year, hours and minutes - Case: yellow gold case, glareproofed sapphire crystal and caseback, screw-locked crown. Diameter 41 mm, thickness 9.5 mm, water resistant to 20 m - Dial: yellow gold-toned dial with “Grande Tapisserie” pattern, green counters, yellow gold applied hour-markers and Royal Oak hands with luminescent coating, yellow gold-toned inner bezel - Yellow gold bracelet with AP folding clasp Full set. Maker: Audemars Piguet. Reference: 26607BA.OO.1220BA.01. Available through ELITA's private desk — verification review, discreet handling and storage. Price on request.