Fundamentals of Aircraft Instruments, US Army TM 55-412, Nov 1968 US Coast Guard Both are in exceptional condition

Both are in exceptional condition for their age

Commonly used in the Junkers Ju-52

and the PBY5A Catalina Seaplane (which used 2)

which would be displayed on the ALT gauge

and certain other aircraft

Fundamentals of Aircraft Instruments, US Army TM 55-412, Nov 1968 US Coast Guard Both are in exceptional conditionThis an original hard copy technical manual, TM 55 412, published by the US Army entitled Fundamentals of Aircraft Instruments in November 1968. It covers the development and basic principles of instruments used in the era, including engine instruments, flight instruments, navigation, and aircraft systems. Many of these instruments were common in the US Army helicopters used during the Viet Nam War, including the UH 1 Huey. It is in very good