1 pointYou obviously took effort in framing this photo study. Pretty derned cool.
1 pointI've been on a mission and I think I have found the manufacture source of the "binding post". Link will take you to the website for the catalog from Bunnell Telegraphic and Electrical catalog with a suggested published date of 1901. Image is from the page relating to the "binding posts" the seem to be quite similar to Katen's image. http://www.telegraph-history.org/bunnell-tel-elec-catalog/index.html
1 pointGE was a big name then, in Canada as well. But there was no free trade, so they built factories in Toronto, Montreal and maybe West of there as well. I like that one, but it is dwarfed by some of your others. Cheers.