BRAND:Omega MODEL:Seamaster Diver Co-Axial-Master MODEL NUMBER:210.30.44.51.03.001 CALIBRE: Omega 9900 POWER RESERVE: 60 hours CRYSTAL:Domed scratch-resistant sapphire crystal with antireflective treatment on both sides CASE: Steel CASE DIAMETER: 44 mm DIAL COLOUR: Blue WATER RESISTANCE: 30 bar (300 metres / 1000 feet) FEATURES: Anti-magnetic,Chronograph,Chronometer,Date,Master Chronometer Certified,Helium escape valve,Screw-in crown,Small seconds,Transparent case back,Unidirectional rotating bezel,Automatic watch