41 mm steel case, Steel and yellow gold bracelet Riveted steel and yellow gold bracelet, polished and satin finish, with folding clasp and safety catch Fixed yellow gold bezel with matt black anodized aluminium disc with tachymetric scale, yellow gold markings Manufacture Calibre MT5813 (COSC) Self-winding mechanical movement with bidirectional rotor system Champagne-color with black counters, domed Yellow gold screw-down winding crown with the TUDOR rose in relief Yellow gold screw-down pushers at 2 and 4 o'clock Domed sapphire crystal Waterproof to 200 m (660 ft) Buy Now: https://www.tinyjewelbox.com/watches/tudor/black-bay-chrono-sampg-41mm-steel-case-2.html