Titanium case with a titanium bracelet. Fixed black titanium bezel showing tachymeter markings. Black / silver guilloche dial with luminous silver-tone hands and index hour markers. Tachymeter. Dial Type: Analog. Luminescent hands and markers. Date display at the 4 o’clock position. Three sub-dials displaying: 12/24 hours, time zone and 1 second. Eco-drive movement. Eco-drive E650, atomic timekeeping, radio controlled engine. Scratch resistant sapphire crystal. Pull / push crown. Solid case back. Case diameter: 42 mm. Case thickness: 13 mm. Round case shape. Band width: 24 mm. Band length: 8 inches. Fold over clasp with a hidden double push button release. Water resistant at 200 meters / 660 feet. Functions: chronograph, 1-second chronograph, power reserve indicator, alarm, day-date, 12/24-hour time. Sport watch style. Item Variations: AT4010 50E, AT4010.50E, AT401050E. Citizen Perpetual Chrono A-T Eco-Drive Black Dial Titanium Mens Chronograph Watch AT4010-50E.