Ok fellow ghostheads, back before my first GB collecting retirement I came across this fine pickup at a local gas/collectible show with my father. Its a GB2 streetsign. Now I've seen all kinds of signs, made of cardboard, plastic resin, etc. But i've never seen one made of tin? (not sure if actual tin, still getting this looked at, but is of the same metal and consistency as other street signs). Also what caught my eye, was this sign has a reflective surface over it, as do actual street signs. as well as screw holes, (where you can see below) this was used somewhere at some point.

So my fellow Ghostheads, could anyone lend some of their insight to where this could have originated? Thanks.
(also I apologize for the shotty pictures, will take better quality ones later when I can locate my camera)