Inspired by Bulova's military heritage and vintage watches of the time, the Hack Watch infuses historical elements for a contemporary lifestyle. The updated style features a three-hand 21-jewel automatic movement with a 42 hour power reserve. The stainless steel case with an ivory dial and luminescent hands and markers also features a center track on the dial displaying 24H time. Black leather NATO strap. Domed mineral crystal. Water resistance to 30 meters. Diameter: 38mm Thickness: 13.45mm