In order to help my fellow puzzlers, I will let you all know that I have been through all results and entry lists that I could find for the period from 1957/59, and there was no car entered as race #201. If indeed this is the US, which I'm fairly sure it is - it could be many tracks, it looks a bit like Elkhart Lake.
The second car (#201) looks a lot like many H-mod cars, but somehow looks a bit too big.
I haven't a clue.........