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F.W. Gregory Patent Insulator, c. 1903.

Gregory Insulator, 1903

Gregory Insulator, 1903

Gregory Insulator, 1903

CD 159 embosssed PAT APRIL 7TH 1903, F.W. GREGORY.
These insulators were used along the railroad right-of-way of the Central Pacific in the Sierra Nevada Mountains of California.

Courtesy Ross Baird.


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