TUDOR Black Bay Steel; 41-mm steel case with polished and satin finish; Unidirectional rotating bezel in steel with 60-minute graduated steel disk, black engraved markings; Manufacture Caliber MT5612 (COSC) Self-winding mechanical movement with bidirectional rotor system; Black dial; Screw-down steel winding crown, with the TUDOR rose engraved and black-lacquered, with black anodized aluminum winding crown tube; Domed sapphire crystal; Waterproof to 200 m (660 ft); Khaki Fabric strap with buckle.