Airspeed Instrument, Soviet/Russian, Unknown function, Cold War-era F-94 such as medium bombers B-25

such as medium bombers B-25 Mitchell

and the Boeing B-29 Superfortress

Bearing Distance Heading

dated 1954

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

Airspeed Instrument, Soviet/Russian, Unknown function, Cold War-era F-94 such as medium bombers B-25This 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