Grolsch Holland Beer sign 1984 vintage

This is a Grolsch Holland beer vintage sign approximately 14 and a quarter inches by 12 and a quarter inches. It is approximately 1/4 inch thick. It looks like glass but I think it is some sort of plastic I am really unsure though. I'm selling this as is... in OK shape. look at the pictures please. ..part of cardboard is seperating from front as pictured. I haven't been able to find anything else like it online. It has a cardboard backing. it says "Imported by Grolsch importers, inc. Atlanta Georgia. 30339 1984 Grolsch importers, inc." on the back.