This adventurous automatic watch provides optimal visibility in dark underwater conditions and features a screw-down crown. The "diver's" marking on the dial asserts that this is an iso 6425 certified watch. 42. 5mm black ion-plated stainless steel case yellow super-luminova® dial, hands, indexes and bezel markings automatic three-hand date movement black silicone strap; buckle clasp 200-meter water resistance