4 3/4" X 3 1/2" (121mm X 92mm)
(skirt ink stamp) PINCO {Porcelain Insulator Co.}
Picture courtesy Fred Collier |
U-572: USA
4 3/4" X 3 1/2" (121mm X 92mm)
(skirt ink stamp) PINCO {Porcelain Insulator Co.}
Picture courtesy Fred Collier |
U number assignment by Jack Tod.
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