Stainless steel case and stainless steel bracelet. Fixed stainless steel bezel. Black dial with luminous silver-tone hands and index hour markers. Minute markers around the outer rim. Dial Type: Analog. Luminescent hands and markers. Date display at the 3 o'clock position. Omega calibre 2500 automatic movement, based upon ETA 2892-A2, containing 27 Jewels, bitting at 25200 vph, and has a power reserve of approximately 48 hours. Scratch resistant sapphire crystal. Pull / push crown. Skeleton case back. Round case shape. Case size: 35 mm. Case thickness: 10 mm. Band width: 23 mm. Fold over clasp with a push button release. Water resistant at 100 meters / 330 feet. Functions: date, hour, minute, second, co-axial escapement, chronometer. Constellation Chronometer Series. Luxury watch style. Watch label: Swiss Made. Item Variations: 12310352001001. Omega Constellation Chronometer Black Dial Men's Watch 123.10.35.20.01.001.