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Electricity Supply
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Object type
insulation tester
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Nalder Brothers and Thompson Limited
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The Record Electrical Co. Ltd
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England
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England, United Kingdom
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Ohmer Insulation Tester By Nalder Bros.
Nalder Bros. & Thompson Ltd. "Ohmer" insulation tester no.1696
Insulation tester
insulation tester with internal dynamo
circa 1940
