I have a tool that maybe was for engineering or electrical for measurement. I could be totally wrong.
It says: Patented Novelty Electric Co. Philad
It also says V over CXD = OHMS Per Foot
It has approx. decimals on one side and B&s.G and Safe AMP. numbers on the other side.
It was my great grand fathers and he was born about 1900 so he most likely used it in the 1920-30's I'm guessing.
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