Suction Gage, AN 5771-5, US Army Air Force WWII C-47 Both are labeled "AF US

Both are labeled "AF US ARMY" on their faces

The knob would rotate the face of the dial while the pointer remains fixed to set the present field elevation

was found in Tunisia in a wine cellar operating as an instrument repair shop

base plate

Unfortunately

Suction Gage, AN 5771-5, US Army Air Force WWII C-47 Both are labeled "AF USThis is a WWII era Suction Gage, AN 5771 5, made by Collens. This indicator has a serial number prefix "AF 43", evidence of a manufacturing year 1943. The AN 5771 5 Suction Gage was used across all aircraft of the US Army Air Corps, including bombers B 17, B 24, B 25, fighters P 38, P 40, P 47, P 51, and transport C 47. The Suction Gage measured the amount of vacuum generated to power the pneumatically operated gyroscopic instruments, such as the Gyro