Airspeed Instrument, Soviet/Russian, Unknown function, Cold War-era F-94 and the Boeing B-29 Superfortress

and the Boeing B-29 Superfortress

since it has Russian Cyrillic lettering on its face

dated Oct 29

Here is a dual Tachometer for use in military helicopters

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 and the Boeing B-29 SuperfortressThis 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