Omega 2531.80.00 Seamaster Professional , Stainless Steel on a Stainless Steel Bracelet, Automatic Movement, Date, COSC, Blue Dial with Luminous Hands and Hour Markers, Size: 41mm, Thickness: 11.5mm, Helium Escape Valve at 10 Oclock, Sapphire Crystal, Water Resistant to 1000ft, Like New with Original Box and Papers.