Evershed gravity controlled voltmeter reading 0 to 120 volts
Evershed gravity controlled voltmeter reading 0 to 120 volts, sectioned.
- Object Number:
- 1909-69/1
- type:
- voltmeter
Two Evershed voltmeters.
Evershed gravity controlled voltmeter reading 0 to 120 volts, sectioned.