Tachometer, Victometer Centrifugal, 1920s USSR We have not yet identified

We have not yet identified the type of RCAF aircraft which may have used this indicator

depressing the lower right knob

the electrical connector is protected by a removable metal cap

The knob was used to set the flow rate

made by Bendix and labeled for engines #1 & #2 and 3 & #4

Tachometer, Victometer Centrifugal, 1920s USSR We have not yet identifiedThis is a WWI or Post WWI vintage aircraft or laboratory tachometer "Victometer" made by the Jos W Jones Co. This is a centrifugal tachometer: as the rotation of the engine shaft rotates a cable attached to the case, flyweights rotate around an internal axis. The weights move outwardly due to centrifugal force, which pull a brace attached to the spring loaded pointer. As the brace is pulled by the centrifugal force of the weights, the pointer is