TUDOR watch. Black Bay Chrono S&G. Domed sapphire crystal. 41mm case. Steel case with polished and satin finish. Black dial, domed. Black fabric strap with buckle. Fixed 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. Approximately 70 hours power reserve. Yellow gold screw-down winding crown. Date. Waterproof to 200M.