1930 Tensio-Meter?

Posted by JGranatelli On 2010/3/4 20:00:51

Dad gave me a box of tools. In the bottom was a nice wooden box with a Tensio-Meter. The paper that came with it mentioned pre 1930.
What is a Tensio Meter? What year make and model or general was it used for?

Thank you for your help,

JGranatelli

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