The Bulova Marine Star men's watch is a classic timepiece with a legacy stretching back decades. The open heartbeat automatic 21-jewel movement is showcased in the dial aperture and in the exhibition case back. The gold-tone stainless steel case is accented with black and features a black dial and a flat mineral crystal. The black textured silicone strap has a contrasting red underside, and the watch is water resistant to 200 meters, living up to its name as a timepiece that can go wherever you do without missing a beat. Case Material: Stainless SteelCase Diameter: 45Case Thickness: 13.45Functions: 3 Hand, Automatic, Sub Second Hand, Hack FeatureMovement Technology: MechanicalCrystal: Mineral CrystalDial Feature: Luminous HandsWater Resistance: 0200MMovement: 82S5Case Color: Gold-ToneDial Color: BlackStrap: BlackBulova Style #: 98A272