Portable voltmeter with probes, probably for testi

Portable voltmeter with probes, probably for testing secondary cells, zero-centred scale 3-0-3, No. 121962 by Crompton Parkinson Limited, Regd No. 711338, English 1920-1940

Details

Category:
Electricity Supply
Object Number:
1990-664
credit:
Gilbert, J.

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