Compass, Magnetic, FL23233, Luftwaffe Canberra The Army Type C-14 Airspeed

The Army Type C-14 Airspeed Indicator was used across a number of US Army Air Corps and Air Force aircraft during WWII

It was they who introduced them not long before the war

It is inert

These can also be seen in the WWII-era flight manuals for fighters P-51

likely 1950's to Vietnam War era

Compass, Magnetic, FL23233, Luftwaffe Canberra The Army Type C-14 AirspeedHere is a WW2 era German Magnetic Compass FI. 23233, made by Plath, as used in aircraft of the Luftwaffe. The fluid has turned cloudy brown, but it remains an exceptional specimen. The fluid could probably be replaced. According to Aircraft Cockpits. com, this compass was used in aircraft Ar79, He72, Ju52, Klem KL35, Bf108D, Ar234B 1, Bu181, DFS 230, and Fi156.