Electrical insulator pin, ca. 1917
Click on the image to zoom. Click and drag your mouse over the image to move it left or right. Use the small navigation window to select the area you wish to zoom on.
Purchase a reproduction of this item on VintageMaineImages.com.
The pin is part of a type of electrical insulator -- a device that keeps electrical current from "leaking" out of lines.
The insulator with the pin (that screws into the base of the porcelain insulator) was patented in 1865.