Vintage 18" x 12" Sunkist Growers Porcelain Enamel ?? Sign RARE VERSION

Description

Vintage 18" x 12" Sunkist Growers Porcelain Enamel ??  Sign  RARE VERSION
Very rare Sunkist growers member sign. See pics. Great condition a couple dings on the edges but very clean overall. I believe its porcelain enamel or something the metal backing is thin and can be bent slightly. Letters feel embossed like porcelain sign but the metal is flimsy and doesn't appear to be incredibly old. There is rust on back seems to have been hung. Definitely Im not sure what this is but there is not another one I can find so hard to think its a repop with embossed letters that there isn't another one for sale.
Location: warehouse glass case