Stainless steel case with a stainless steel bracelet. Fixed stainless steel bezel with a black ion-platedtop ring showing tachymeter markings. Black dial with luminous silver-tone hands and index hour markers. Minute markers around the outer rim. Dial Type: Analog. Luminescent luminous. Date display at the 4 o'clock position. Day of the week display at the 2 o'clock position. Three sub-dials displaying: 60 second, 24 hour and functions. Eco-Drive E650, Atomic Timekeeping, Radio Controlled eco-drive movement. Scratch resistant sapphire crystal. Pull / push crown. Solid case back. Case size: 42 mm. Case thickness: 12 mm. Round case shape. Band width: 19 mm. Band length: 8.5 inches. Deployment clasp. Water resistant at 200 meters / 660 feet. Functions: perpetual calendar, chronograph, alarm, date, day, GMT, second time zone, hour, minute, second, power reserve indicator, tachymeter. Additional Info: atomic timekeeping, radio controlled, 5 time zone. Dress watch style. Watch label: Japan Movt. Item Variations: AT4008 51E, AT4008.51E, AT400851E. Citizen Eco Drive Chronograph Black Dial Mens Watch AT4008-51E.