4" X 5" (102mm X 127mm)
No markings {Pittsburg}
Picture courtesy Elton Gish |
U-224A/B: USA
4" X 5" (102mm X 127mm)
No markings {Pittsburg}
Picture courtesy Elton Gish |
U number assignment by Jack Tod. Note this is a two part insulator - the top gets the A suffix and the bottom the B.
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