Rare Vintage Blenko Clear Glass Dealer Store Display Sign

Fresh from an estate comes this vintage BLENKO store sign. At least I think it's a sign or display, some kind of advertising for BLENKO.

It's clear glass with small bubbles inside and measures roughly 11 inches long by nearly 5 inches tall at the tallest point and maybe 1/2 thick. I n excellent condition with no issues. Thanks for looking and good luck!