I enjoyed the posts about the plow wrench, and when I saw one in a Topeka antique shop yesterday, I worked on getting it.
I traded a (not old at all) $3 Plumb hatchet for it. Told the lady she should tie a ribbon around it.
It is marked 9N17014 FoMoCo (in the oval) USA on the front and circle M 17 on the back.
Made me a happy guy.