I picked up this American sign today that I had never seen before. I feel that it is real but am not sure. {options ?}

It is porcelain and has good shelving. What would it have been used for? I put it against the add panel on a Wayne 60 and found that it would look good in it. The top edge is bent over in order to hook onto something and then a lower oblong hole for a screw.

If it where a repro I cant see anyone taking the time to bend over the top or make an oblong hole versus a round hole.