The Luminox Navy SEAL Chronograph with a black dial and rubber strap, model XS.3581.SIS, is a Swiss-made quartz diver's watch. Key features include a Carbonox case, Swiss quartz movement powered by the Ronda 5030.D caliber, and a mineral crystal. It boasts an analogue display with chronograph function, 12/24-hour display, luminous hands and markers, and a date display. The watch is equipped with a unidirectional rotating bezel, screw-down crown, screwed case back, and buckle clasp. With a water resistance of 200m, it has an approximate case diameter of 45mm and a thickness of around 15mm. - Swiss Quartz - Chronograph - Approx 50 Months Battery Life - Unidirectional Rotating - Constant glow for up to 25 years - 45mm Case Size - Mineral Crystal - Carbonox Case - Rubber - Date Display - 200 Meters Water Resistant