American Insulator Co. CD 156.1 narrow groove variant

By George Toften, Sr.; posted January 1, 2006
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Hi all, Jean & Jack, great pictures on the poster gallery. Here are a few from my collection. Thought you might like to see more shots of this style to compare the CD 156.1 variant. This one is not listed in the book with the narrow wire groove. It is completely different as can see. George

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