Okay, I see. I read the forum wrong. It was a very similar logo to the Cadillac car logo. GM might have filed a lawsuit, but not likely that they did. This clock was also marketed by Vidrio Products Corporation of Chicago, but made by Wabash. It most likely is one with a movement designed by Max Knobel. Most of the clocks from the Chicago area in this time period were the same clocks with many names on them, I think it could have been a company that made them all, Kodel. I have seen Royal, Washington, Lincoln, Atlas, Havlin, and many other cathedral clocks that are the same thing. I think that the reasons why the traditional clock manufacturers were so slow to make electric clocks was because the needed to spent time an money on perfecting a working movement, but that is just a guess.
The Wabash company could have been a part of Kodel. I have seen a few of Max Knobel's clock movements with the name Kodel. I am just taking a guess, but Kodel could have been the manufacturer of these cheaper electric clocks, that might be why so many were made in the Chicago area.