Audemars Piguet Royal Oak Selfwinding Chronograph Ref. 26240BA.OO.1320BA.01 The Audemars Piguet Royal Oak Selfwinding Chronograph ref. 26240BA.OO.1320BA.01 has a 41 mm 18-carat yellow gold case and the self-winding Calibre 4409. - Self-winding Calibre 4409, 70 h power reserve - Functions: flyback chronograph, hours, minutes and small seconds - Case: 18-carat yellow gold case, glareproofed sapphire crystal and caseback, screw-locked crown. Diameter 41 mm, thickness 12.4 mm, water resistant to 50 m - Dial: yellow gold dial with vertical satin-finishing, yellow gold Royal Oak hands with luminescent coating - 18-carat yellow gold bracelet with AP folding clasp Full set. Maker: Audemars Piguet. Reference: 26240BA.OO.1320BA.01. Available through ELITA's private desk — verification review, discreet handling and storage. Price on request.