Airspeed Instrument, Soviet/Russian, Unknown function, Cold War-era F-94 See photo of PV-1 Instrument

See photo of PV-1 Instrument Panel from the Pilots Flight Manual dated 1944 showing instrument location

and the Boeing B-29 Superfortress

dated Oct 29

dated 1954

the faceplate rotates to indicate the selected frequency within the small metal frame (to which a small lamp could be affixed for illumination)

Airspeed Instrument, Soviet/Russian, Unknown function, Cold War-era F-94 See photo of PV-1 InstrumentThis Soviet Russian aircraft instrument appears to be for setting an airspeed between 70 220 kilometers per hour. The center knob turns and rotates the only pointer around the dial. The seemingly pitotstatic pneumatic connections in the back are protected by a beige tube for storage (I'm assuming), and an electrical connector exits the back case. It may be some sort of a stall warning instrument, whereby the pilot could set an airspeed below which a