Audemars Piguet Royal Oak Tourbillon Extra-Thin Openworked Ref. 26518ST.OO.1220ST.01 The Audemars Piguet Royal Oak Tourbillon Extra-Thin Openworked ref. 26518ST.OO.1220ST.01 has a 41 mm stainless steel case and the hand-wound Calibre 2924. - Hand-wound Calibre 2924, 69 h power reserve - Functions: hours/Minutes - Case: stainless steel case, glareproofed sapphire crystal and caseback Diameter 41 mm, thickness 9 mm, water resistant to 50 m - Dial: rhodium-toned dial, openworked, white gold applied hour-markers and Royal Oak hands with luminescent coating - Stainless steel bracelet with AP folding clasp Full set. Maker: Audemars Piguet. Reference: 26518ST.OO.1220ST.01. Available through ELITA's private desk — verification review, discreet handling and storage. Price on request.