late 1940's single-sided american vintage industrial die cut steel "440-volt" black porcelain enameled cautionary or warning sign

matching set of original early 20th century chrome-plated cast ornamental bronze otis elevator instructional plaques with egg and dart borders

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

original and rare early 1920's antique american industrial salvaged chicago single-sided vitreous enameled "high voltage electrical equipment" danger or cautionary factory sign with nicely aged patina

original and remarkably intact dated c. 1907 original and fully functional american industrial salvaged chicago copper-plated cast iron commercial building basement switchboard voltmeter

original and remarkably intact c. 1921 historic salvaged hotel lasalle yale original room key w/ red plastic key fob

highly desirable original american depression era antique industrial safety first substation "high voltage" porcelain enameled die cut steel steel

highly sought after oversized antique american industrial early 20th century solid copper three-arm no fuse heavy duty switchboard panel knife switch with wood handle

original c. 1920's original and intact flush mount masonic temple push button switch plate with intact richly colored ruby red faceted glass indicator light

original c. early 20th century antique american industrial triple pole "cutter" switchboard nicely aged copper 125 volt knife switch with original turned black painted handle

two matching early 20th century fully functional green enameled american industrial push-button cutler-hammer factory pendant light sockets

single all original and intact early 1920's antique american otis elevator salvaged chicago factory up/down wall indicator plaque with housing

original late 1930's antique american single-sided cherry red porcelain enameled "12,000 volts" danger sign salvaged from the a. finkl foundry undergoing demolition

very rare oversized early 20th century new york city subway sub-station open style or "front" switchboard with faux marbleized solid slate insulator back panel

rare softcover “handbook of Westinghouse watthour meters” published for westinghouse electric & manufacturing co., newark, new jersey.

fully adjustable early 20th century refinished telephone switchboard operator bent birch wood stationary chair or stool with cushioned backrest and heel ring or footrest

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

nicely worn and weathered c. 1930's original single-sided "high voltage" steel mill porcelain enameled danger sign with skull and crossbones

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