Sievert Collection: Porcelain Whatisit. Ans. Series Circuit Lamp Tester SOLD

By Colin Jung; posted August 5, 2017

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Has the general form of a fuse cutout, but not sure of identification.

Per Chris Hedges this is a Series Circuit lamp tester. They generally were located on an Arm by the RO Series Transformer. You could also ground out the line to work on it via an insert.