c. 1930's antique american industrial vibrantly-colored outdoor power substation porcelain enameled high voltage "danger" sign designed and fabricated by the veribrite sign co., division of general porcelain enameling & mfg., co., chicago, il. the single-sided antique vitreous enameled sign is comprised of genuine porcelain enamel fired onto "specially processed iron." original steel grommets intact. the art deco style sign features distinctive graphics along the border. measures 11 x 14 inches.