Posted 10 years ago
tcroc56
(21 items)
solid brass stamped sign says "subtractive polarity transformer" general electric schenectady, ny, u.s.a. it is 11" by 7" anyone know anything about it? how old?
general electric | ||
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Posted 10 years ago
tcroc56
(21 items)
solid brass stamped sign says "subtractive polarity transformer" general electric schenectady, ny, u.s.a. it is 11" by 7" anyone know anything about it? how old?
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i have scores of signs like these all different sizes som are brass some are porcelain covered any info is appreciated