What do I have here?

[unclemac]

I found this years ago on a city street by an old phone pole. Just what is it and how old is it?

 

Amazon Forum Fav 👍

Upgraded Night Vision Monocular Digital Infrared Monocular Telescope for 100% Darkness with 8X Zoom - Grab it through Amazon!

[GaRebel1861]

Some kind of an electrical or telegraph insulator?

 

[Harry Pristis]

Some kind of an electrical or telegraph insulator?

Functionally, it looks to me to be an insulator for a pole guy wire. It would be used to keep the guy wire (cable) from acting as a ground from the pole.

Another possibility is that it was used to tether one end of a long-wave antenna, again to keep the long wire from grounding.

 

[unclemac]

bingo!

thanks, HP

Glass Strain Insulators