TUDOR Black Bay GMT S&G. Steel 41mm case with polished and satin finsh features a 48 notch bidirectional rotating bezel in yellow gold with 24 hours graduated matte brown and black anodised aluminium disc with a yellow gold screw-down crown, with the TUDOR rose in relief, with circular satin-brushed steel winding crown tube. Manufacture Calibre MT5652 (COSC) self winding mechanical movement with bidirectional rotor system with power reserve approximately 70 hours. Black domed date display dial on a brown leather strap with steel folding clasp and safety catch. Waterproof to 200m ( 660 ft).