The Audemars Piguet Royal Oak Chronograph 26240ST.OO.1320ST.04 is a special selfwinding chronograph created to mark the Royal Oak’s 50th anniversary. Housed in a stainless steel case, this 41mm model maintains the collection’s signature octagonal bezel, exposed screws, and integrated bracelet. Its unique khaki green dial features the iconic “Grande Tapisserie” pattern, adding both depth and a bold, contemporary touch to the classic Royal Oak design.