Tudor Black Bay 58, 39mm steel case with polished and satin finish, blue, domed, unidirectional rotatable bezel in steel with 60-minute graduated disc in matt blue anodised aluminium and silver gilded markings and numerals, manufacture calibre MT5402 (COSC) self-winding mechanical movement with bidirectional rotor system, riveted steel bracelet with polished and satin finish, with folding clasp and safety catch, domed sapphire crystal, waterproof to 200m (660 ft)