Authentic Omega Speedmaster Racing Chronometer watch. Equipped with an automatic chronometer movement (Calibre 3330). Features a black aluminum filled dial combined with silver tone elements, luminous hands and index hour markers, three 'Clous de Paris' design sub-dials for day/night indicator, date function at the six o'clock position, tachymeter scale on bezel. Includes scratch resistant sapphire crystal lens. Constructed from brushed and polished steel case paired with a brushed and polished stainless steel bracelet equipped with deployment push-button foldover clasp mechanism. Water resistance up to 100 meters (330 feet). Comes with a standard 5 year WatchMaxx warranty. Functions include date, power reserve, hour, minute, second hand, chronograph sub-dials.