This wrench has the small circle "M" trade mark of Moore Drop Forging Company. Alloy Artifacts is in the process of creating a Moore section, and do not list this particular wrench yet. The large open end is 15/16", next to a 3/4" box. Then the other end has the 5/8" box size. AA says Spark plug/head bolt wrench, but as I said they do not show the 3/4" box. Does anyone elese have any additional info on it, like what the 3/4" may have been used for?
Thanks,
Wayne