Any one care to verify these are Jumbos? Located at the St. Anne Brick & Tile Co. ,St. Anne Illinois ...One looks like a fog bowl, a couple look like Jumbo CD 140 ..compared to the small signals below they looked like Jumbo Insulators. City is south of Chicago so possible big name catalogs companies supplied the insulators for the DC power to the furnaces. Post Card was with a lot of 1910 era cards. Thanks

close up https://www.insulators.info/pictures/?id=572821689