TUDOR watch. Black Bay 31 S&G. 316L steel case with polished and satin finish. Flat sapphire crystal. 31mm case. Steel and yellow gold bracelet, polished and satin finish, with steel “T-fit” folding clasp and safety catch. Champagne-color dial with decoration and diamond hour markers, flat. Manufacture Calibre MT5201 (COSC) Self-winding mechanical movement with bidirectional rotor system Integrated construction. Waterproof to 100M.