Sperry Marine Gyro-Compass and Gyro-Pilot Manual 1944
This is an original hard copy manual for the Sperry Gyro-Compass and Gyro-Pilot system used in sea vessels during the 1940's and 1950's. The ~60 page manual describes the operation and maintenance of the system. It is full of text, illustrations, and diagrams. It was published in 1944, and is in very good condition.