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, yellow gold center links at 6 and 12 o’clock, remaining center links in steel covered by a 0.2mm 18 ct yellow gold cap, folding clasp and safety catch, domed sapphire crystal, waterproof to 200m (660 ft)