ADMIRALTY - Manual of the Admiralty Gyro-Compass (Sperry Type) 1941. Admiralty Compass Department. [Second Impression].

HMSO,, 1943. Roy. 8vo., Second Impression, with 25 photographic plates and 28 folding plates on lighter stock (one poorly folded); cloth, gilt back, case mildly shaken (but binding entirely sound) else a good, clean copy. Sold from the library of the Military College of Science with its stamps on free endpapers. Publication code CD 210/41- June 1941. The 1941 edition replaced the previous issue of 1931.