Primarily Petroliana Shop Talk Forums Shop Talk Petroliana Forums Known & Suspected Unmarked Petro Reproductions atlantic sign - real or repop ?

I took a 13 X 9 Atlantic sign on trade back in '98. It's been packed away ever since. I just pulled it out to look at the back. The back on mine is light grey, and it has some black rack marks.
Mine has six mounting holes. Now I wonder if it's a repro? It never occurred to me when I got it that it could be a repro as the person I got it from would never knowingly buy or sell a repro.