Epic find! Somebody with good taste has been building that collection. So much good stuff there. 2 Kohler Siblys, Standard Altas and Expellos, American Standard Carlisle, Case Kidney and BLACK Case Model A lowboy. Too cool!
That Kokomo Sanitary bowl is very interesting! I know Standard had a plant there as well as other locations by the 1920s. I would guess that Kokomo Sanitary was a separate company making sanitaryware and probably got bought out by Standard. It would be neat to know more about that.
You should get that very first toilet that you filmed on this video with that circle logo. Sorry, I couldn't see what that toilet was called. Looks like its from the 1910's or 1920's.