Thanks guys. I was wondering about that. Didn't know what the AM-39 meant in the right hand corner. The sign is porcelain, not painted, so I guess I thought that was the date. It has an aluminum frame around it. Some kid had put stickers on the sign. I used Goof-Off and when I ran out of that, I used laquer thinner. I was scared to use it at first because I thought the sign was painted and not porcelain, but after looking at the sign closer, it appeared to have shelving like a porcelain sign.