Vintage General Radio Company VARIAC Type W10M autotransformer in gray enclosed bench-top housing. Factory plate shows Line 120V 50-60 cycles and Load 0-140V 10 Amps. Large front dial is marked 0-140. This example includes an attached metal outlet box that appears to be a later shop or institutional add-on rather than a confirmed factory feature. Cosmetic wear, dust, and age-related surface marks are visible.
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