Boston Vicinity, c.1910. CD 269 Eared Jumbo in Use on Trolley Service Pole.
By Joe Maurath, Jr.; posted December 13, 2020
View Original: Click to zoom, then click to magnify (810 x 575) 191KB
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Note that this pole is square and tapered a bit as it nears its pointed top. Click "Next" for a good closeup view of this insulator on its crossarm supporting its heavy DC cable. |