Vintage appliances. What were they

I was recently in one Center for Metrology and Standardization.

While waiting for his turn to hand over the instruments for verification, he became interested in a curious cabinet, where electrical measuring instruments of the beginning and middle of the 20th century stood behind the glass.

As it turned out, the employees of the Center organized a small museum of ancient electrical measuring equipment. The most interesting thing is that all these devices are not only operational, but still successfully pass the annual metrological verification (all of them are on the balance sheet).

.No one allowed me to open the glass doors, so I had to take pictures through the glass.

Unique reference book "Electrical Measuring Instruments" 1927

Universal bridge UMV. 1948

Electrical energy meter K 10. 1937

Electric energy meter Ferranti. 1927

Resistance coil

Milliammeter AST. 1958

MSR 58 resistance magazine. 1960

Resistance coil R 322. 1971

Voltmeter M 210. 1953

Apparatus for testing current transformers ATT. 1957

Self-recording AC ammeter H 344. 1970

Tube voltmeter RVM 103. 1952