My dad found these digging in the basement last week. They are left over from when Harry (my great-grandfather) was buying tools from the US military. This is a 5/8 x 9/16 Fairmount Open End Wrench. It could also be used as a dumbbell for children as they weigh one pound each.
Have pretty much the same wrench in Armstrong as well, just a little beefier. We’re selling them for $10.00, but if you find them cheaper at Home Depot, we’ll cut the price in half.
I did some box art for a guy who wanted me to paint a box on a box and I accidentally erased the pics that I took of it. If that guy is out there, and still has the box, send us some pics.