Model Name: Royal Oak. Dial: Audemars Piguet Royal Oak 41mm Black Stick Dial (Stainless Steel). « Audemars Piguet Royal Oak 15500ST. OO. 1220ST. 01 Selfwinding Stainless Steel Bl Audemars Piguet Royal Oak Chronograph 41mm Chocolate Dial 26331or. Oo. 1220or. 02 »