Tudor Black Bay Chrono S&G, 41mm steel case with polished and satin finish, black, domed, fixed 18 ct yellow gold bezel with matt black anodised aluminium disc with tachymetric scale, yellow gold markings, manufacture calibre MT5813 (COSC) self-winding mechanical movement with bidirectional rotor system, black fabric strap with buckle, domed sapphire crystal, waterproof to 200m (660 ft)