Based on the scales, the joint style, and the binding, I think it is a Stanley No. 78 1/2 rule.
I like the seconds rules. I have several in my collection. You will also sell Imperfect, Cull, etc. on tools. They don't seem to sell much better. I have a Mossberg bicycle wrench on Ebay stamped Second Quality. I thought it was neat, but have not got any bites on it yet.