lot of six matching original c. 1940's "new old stock" american industrial high voltage danger or cautionary signs likely fabricated by the ready-made sign co., new york city, ny. the group of signs are comprised of heavy gauge die cut steel with a red and white baked enameled color scheme. the signs were salvaged from the basement of an old city of chicago power substation. each sign measures 11 x 14 inches. priced individually.