just a little information.
in 1912, The Ideal Machine & Tool Company was located at 128 - 130 Opera Place, Cincinnati, Ohio.
listed as a maker of models of small devices made of metal.
in 1912, they claimed to have a quarter century experience in this line of work.
what I believe is that if you had an invention and needed a working model to present to the patent office, they were capable of performing
that task.
they could also help you market your product.
NOTE; it is very possible that they had only made one example, and never followed thru with a patent ?????? could have passed away or
perhaps did not have the capital to follow through. or were told that it would not sell. yes, there are mysteries in many finds.
the person that has this wrench may be a very lucky owner.
good luck with your search for the correct answer.
Frank
was it found at an estate sale ??? could backtrack to the family. (just a thought)