Sorry this took so long ..... but anyway ... here are two photos of an orginal COE step. From what I've seen the COE steps are all the same from 1948 through 1952. This particular one is from a 51 F6 COE.
I am currently dipping this step in chemical to remove the paint, and will be bead blasting it next week sometime. I can put up better photos then.
RG in Spokane