Square Insulator?

By Pam Schmidt; posted November 11, 2024

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I was recently visiting the Train Museum in Sacramento and they added a new display (they change them out every few months). This one included a square insulator and I have never seen one. Does anyone have any additional information about these? Thank you!

It has been identified as the rare Gregory CD 159 insulator. I am so happy that I saw it in-person! Thank you to everyone that responded. :)

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