visually striking c. 1940's original and vibrantly colored single-sided stamped steel "low voltage" cautionary or danger sign with skull & crossbones

american depression era single-sided white and black enameled stamped steel "ladies" flush mount lavatory or bathroom door sign with surface wear evident

c. 1950's original "new old stock" single-sided stamped steel brightly colored cherry red enameled "think!" factory wall-mount machine shop sign

hard to find early c. 1918-20 original single-sided american industrial stonehouse porcelain enameled steel factory "2,300 volts" danger sign

original new old stock c. 1930's american industrial single-sided cold-rolled steel "stenography" door or wall sign with intact grommets and cobalt blue lettering

oversized diamond-shaped vintage american industrial bright orange enameled city street construction zone "slow" sign with lightly embossed lettering

nicely worn and weathered early 1940's vintage american shopkeeper's storefront single-sided entrance door push bar sign with original black and white paint finish

original c. 1940's deeply embossed heavy gauge steel american industrial city of chicago "sharp left turn" cautionary street or traffic sign

late 1960's original american single-sided wall-mount bright yellow "health center" stamped steel directional sign with reflective surface

oversized single-sided c. 1940's american industrial die cut steel "confined space" danger or cautionary wall-mount factory sign

c. 1940's american industrial oversized die cut steel chicago furniture factory "sliding doors" danger or cautionary sign

original c. 1930's american antique industrial single-sided heavy gauge porcelain enameled iron "high voltage" factory wall-mount danger sign

c. 1900's american antique industrial flush mount solid copper commercial building switchboard identification plaques with beveled edges

c. 1900's single american industrial beveled edge solid copper commercial building basement open switchboard "vaccum cleaner" plaque

group of three original early 20th century antique american industrial beveled edge copper metal open switchboard plaques

set of early 20th century american industrial commercial building switchboard solid copper identification plaques with beveled edges

pair of matching early 20th century american industrial single-sided solid copper switchboard identification plaques with incised lettering

early 20th century single-sided solid copper "basement" open switchboard beveled edge switch identification plaque with lightly incised lettering

hand-painted late 1930's vintage american city of chicago brightly colored "no dumping" heavy gauge steel street sign

original nicely worn early 20th century american antique industrial "seek-no-further" thin yellow brass stencil template plate

single-sided early 20th century antique american industrial wrought brass metal "unknown" letter stencil template plate

original american industrial single-sided "limber twig" apple brand wrought brass metal stencil template from a chicago sign shop

original "new old stock" c. 1950's american reverse-painted ruby red movie house illuminated restroom glass panel