Automatic movement (self winding): Mechanically powered and wound by the motion of the wearer's arm Black alligator strap Deployment clasp with push-button Stainless steel bezel and case Sapphire crystal Serrated push-pull crown Black skeleton dial with silver-tone hands Case: 42mm in diameter x 13.9mm thick Bracelet/strap: 22mm wide x 8.75in long Water-resistant up to 50 meters Manufacturer's limited warranty Colour: grey