original early 1940's american vintage industrial flush mount porcelain enameled die cut steel "no admittance" factory sign fabricated by the burdick sign co., chicago, il. the single-sided sign features an encircled "halting hand" with bold white lettering against a background. nicely weathered surface patina. the office door sign contains four screw holes with intact steel grommets. measure 14 x 4 inches.