close vintage analog voltmeter with scale and control knobs |
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navigate by keyword : analog antique classic collectible device dial electricity engineering equipment gauge german heritage history industrial instrument knob laboratory measurement mechanics needle panel pointer precision regulator retro scale science switch technology testing tool vintage voltage voltmeter wooden |
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Detailed close-up of an old analog voltmeter showing the needle gauge, scale, and control knobs, used for measuirng electrical voltage |
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