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What is this wrench??


dlh61olds
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I have 3 different size versions all patented 1900 and 1902 each with different manufactures  names.

The small ones (3 1/2") were sold as bicycle wrenches, the larger ones I am sure came about when cars and equipment became more available.

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My Grandfather started plumbing in 1895 and used these wrench's. to tighten brass nuts without scuffing them. The standard size was 9 inches and the jaw opened to 2 1/2 inches.  I think he called it a water pump wrench because it was thinner than the monkey wrench that had the wider jaws and came in different sizes .from 6 inches to 21 inches and had a wooded handle sometimes called a knife handle wrench.

 

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