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On display at the CRMI | |||
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Wayne, that's a toughy. Frank | ||||
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IHC Member 456 |
I'm pretty sure that it's a wristwatch case back opener/closer. Mike | |||
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IHC Member 456 |
It's a Williams Universal spanner wrench for opening and closing case backs. The patent number is 2418999. You can look up the patent at the uspto.gov website | |||
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