A dramatic and enduring design that stands out for all the right reasons, this OMEGA Constellation Co-Axial Master Chronometer Automatic Watch combines traditional style with a powerful engine. At A Glance  Presented on a black rubber strap 41mm stainless steel case with engraved bezel and 50m water resistance Domed scratch resistant sapphire crystal with anti-reflective coating on both sides Grey dial with baton and Roman numeral hour markers Date window at 6 o’clock Anti-magnetic. Protected against magnetic fields greater than 1.5 tesla Powered by the OMEGA Co-Axial Master Chronometer Calibre 8900 automatic self-winding movement 60 hours power reserve