TUDOR watch. Black Bay 54 "Lagoon Blue." 37mm stainless steel case with polished and satin finish. 60-minute unidirectional bezel in stainless steel with mirror-polished steel insert devoid of minute graduations. Manufacture Caliber MT5400 (COSC) Self-winding mechanical movement with bidirectional rotor system. Power reserve of approximately 70 hours. Blue, domed and textured dial. Stainless steel screw-down crown with the TUDOR rose in relief. Domed sapphire crystal. Five-link stainless steel bracelet with polished and satin finish, with TUDOR “T-fit” clasp. Waterproof to 200m (660 ft).