Vintage probably 1950s could be earlier oak voltage meter I believe this is in working order but not tested the vault arm moves freely but really just a lovely decorative item 10 cm wide 6 cm depth 13 cm height
The history of voltage meters includes the invention of the first voltmeter, the first multimeter, and the Avometer:
Voltmeter
The first voltmeter was developed by Edward Weston in 1888. William Stanley also developed a voltmeter driven by a magnetic coil in the 1880s.
Vintage probably 1950s could be earlier oak voltage meter
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