The Audemars Piguet Royal Oak Perpetual Calendar, reference 26613ST.OO.1220ST.01, is cased in stainless steel, on a stainless steel bracelet with AP folding clasp bracelet. Maker: Audemars Piguet. Reference: 26613ST.OO.1220ST.01. Available through ELITA's private desk — verification review, discreet handling and storage. Price on request. Case Material: Stainless steel. Dial: Turquoise blue dial with 'Grande Tapisserie' pattern, blue counters, white gold applied hour-markers and Royal Oak hands with luminescent coating. Bracelet/Strap: Stainless steel bracelet with AP folding clasp.