[Audemars Piguet Watches] GR New Audemars Piguet Royal Oak Offshore 15407ST.OO.1220ST.01 Men's Mechanical Watch Calibre3132 One-Piece Movement 41mm diameter Thickness 9.9mm Dark grey dial Shape: Round dial Material: Hollow dial Pair it with rose gold fluorescent three-dimensional time mark and royal oak pointer mirror material: anti-glare treatment sapphire crystal glass mirror crown material: stainless steel Screw-in crown back penetration: back penetration Anti-glare sapphire glass mirror