old coke sign,fiberglass i believe,, anyone have any info,,

i found this in a surplus yard in st louis,, 39" tall 12.5" wide and is 2.75 deep,, looks 3d,, hand painted, wording is in very high relief,, and the cap and ribs of the bottle are to,,,anyone ever seen anything like this,,, made out of fiberglass and had pieces of plaster of paris in back,, which i removed,, can anyone tell about what year it is by the bottle design,cap and such

thanks frank