Omega Style No: 310.30.42.50.01.004 Omega Speedmaster Moonwatch Professional - 42 mm Steel Case - Black Bezel - Lacquered Double Plate Step Black Dial - Polished-Brushed Stainless Steel Bracelet

42 mm steel case with anti-magnetic protection, black ceramic bezel ring, scratch-resistant sapphire crystal with anti-reflective treatment inside, lacquered double plate step black dial, Omega 3861 manual-winding chronometer movement, approximately 50 hours of power reserve, polished-brushed stainless steel bracelet. Water resistant to 50 metres (165 feet).