Not a vintage photo here. I have been saying that the CD 319 insulators were changed out on the B.C.Elecrtic Buntzen Lake power system. I was very lucky to find a mint change out insulator a few years back. This was given to me by a fellow whos father worked on the line to upgrade to modern suspension type insulators. I do not know when this happened. But he saved this one. Put it in the shed behind his house. He passed. His son found it on clean up and passed it to me.