Bringing this classic design right up to date, this OMEGA Constellation Co-Axial Master Chronometer Automatic Watch combines dramatic style with precision timekeeping. We love its monochrome look. At A Glance  Presented on a black leather strap 41mm stainless steel case with black ceramic 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