U.S. NAVY Bureau Of Ships Mounted Life Boat Compass 1943 Mark I Mod O NXSS-36876. Solid brass liquid filled compass. Compass is in excellent working condition. Original data plate indicates this was made in 1943 by C.G. Conn. Ltd. It is marked, "U.S. NAVY BUREAU OF SHIPS". This style of compass was mounted in life boats. Very heavy solid brass compass. Measures 5 inches in height.