| Time Period Manufactured | Pre-1930 |
|---|
Check the listing for details. Antique 1905 Weston Model 1 Direct-Reading Voltmeter No. 16991 Volt Meter Old. Listed at 225.00 USD. The certificate is dated December 1st, 1905, and provides a fascinating look into early 20th-century precision engineering. It notes the resistance for the 150-volt and 15-volt coils, both standardized at the Weston Laboratory.
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