Airspeed Instrument, Soviet/Russian, Unknown function, Cold War-era F-94 dated 1954

dated 1954

and the Boeing B-29 Superfortress

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

such as medium bombers B-25 Mitchell

Here is a dual Tachometer for use in military helicopters

Airspeed Instrument, Soviet/Russian, Unknown function, Cold War-era F-94 dated 1954This 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