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Campbell Patent Square Stanley 32 1/2 Rule
Ontario Antique Tools » The Tool Shoppe » Marking / Measuring » Campbell Patent Square Stanley 32 1/2 Rule

Campbell Patent Square Stanley 32 1/2 Rule

Robert Campbell's Oct 1 1907 patent (click here for more info) rule attachment to convert any appropriate width rule to a square. Includes a Stanley 32 1/2 rule.

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