Omega Speedmaster '57 Omega Co-Axial Chronograph Watch - 41.5 mm Steel Case - Brushed Bezel - Black Dial - 331.10.42.51.01.001

41.5 mm stainless steel case, transparent back, brushed bezel with with tachymeter scale, scratch-resistant sapphire crystal with anti-reflective treatment on both sides, black dial, self-winding chronometer Omega 9300 movement with Co-Axial Escapement, chronograph, date, and small seconds, approximately 60 hours of power reserve, stainless steel bracelet. Water resistant to 100 m.