The way you know that sign is reproduction is to go out and see the real thing. If you have been in it for a while, its easy to see. If you haven't you have to do a little more research. Buy some books and compare. Get some of the repo catalogues and see that they offer this sign for less than 30.00 shipped. Most of the time, the size will give it away immediately. Other times its harder. Ask more questions and be informed. I believe that same sign has been discussed here before.
