Tudor Black Bay Chrono, 41mm steel case with polished and satin finish, opaline with black counters, domed, fixed 316L steel bezel with matt black anodised aluminium disc with tachymetric scale and silver markings, manufacture calibre MT5813 (COSC) self-winding mechanical movement with bidirectional rotor system, black leather strap with removable bund with folding clasp and safety catch, domed sapphire crystal, waterproof to 200m (660 ft)