Aircraft Instruments by Emanuel Stieri 1943 C-121 The instrument measure approximately 4

The instrument measure approximately 4 inches wide and 10 inches tall

Army Type C-7

This is a pair of 1940-50's vintage dual engine Oil Pressure Gages

This one has a serial number showing a year of manufacture of 1944

50-1 B-29 Gunnery Strategic Air Command dated Jan 1948

Aircraft Instruments by Emanuel Stieri 1943 C-121 The instrument measure approximately 4Here is a hardback bound pocket reference for Aircraft Instruments by Emanuel Stieri published in 1943. With over 200 black and white illustrations, Stieri discusses most of the instruments used in aircraft of that era, including tachometers, airspeed indicators, gyro horizons, compasses, drift meters, quantity and temperature indicators, and more. The author describes the instruments, how they function, and the most common servicing procedures.