Pilots' and Mechanics' Aircraft Instrument Manual by GC DeBaud 1942 P-63 Used for sighting 3"/50 guns

Used for sighting 3"/50 guns

this indicator appears to have a production year of 1937 (3768/37)

which would release the lens for replacement

local magnetic variation can be set in at the master indicator so that all indications will be in relation to true north

Pilots' and Mechanics' Aircraft Instrument Manual by GC DeBaud 1942 P-63 Used for sighting 3"/50 gunsThis textbook on aircraft instruments covers essential knowledge of the fundamentals, operation, servicing, and repair of instruments known in 1942. This 490 page book is in fair condition given its age. Pages appear to be intact with some page wrinkling due to water ingress.