Embracing its ocean heritage, this OMEGA Seamaster Diver 300m Ceramic Automatic Men’s Watch showcases a legendary style which is taken to the next level with a laser engraved black ceramic dial. At A Glance  Black and grey NATO strap 43.5mm black ceramic case with a black uni-directional rotating bezel and 300m water resistance Helium escape valve Domed, scratch-resistant sapphire crystal with anti-reflective treatment on both sides Black ceramic dial with luminous hour markers Powered by the Master Chronometer certified OMEGA Co-Axial Calibre 8806 automatic movement Minimum power reserve of 55 hours