Tachometer, Victometer Centrifugal, 1920s USSR Here is an engine Torque

Here is an engine Torque Pressure Indicator

The glass is intact

the electrical connector is protected by a removable metal cap

dated Oct 29

Tachometer, Victometer Centrifugal, 1920s USSR Here is an engine TorqueThis 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