Omega Style No: 311.92.44.51.01.005 Omega Speedmaster Moonwatch Omega Co-Axial Chronograph Watch - 44.25 mm Black Ceramic Case - Black Dial - Black Nylon Strap

44.25 mm black ceramic case, transparent back, black ceramic bezel, sapphire crystal with anti-reflective treatment on both sides, black dial, caliber 9300 self-winding movement with chronograph function, approximately 60 hours of power reserve, black nylon strap. Water resistant to 50 m (167 ft).