Hello Modell. What you see is not a "red ring on the tires"; it is the actual wheel rim that is painted red. The wheel cover does not hide the entire rim, as in later years.

Back to the Future???

From looking at this page, it appears to be a 1937-1938 Cadillac- http://www.car-nection.com/yann/Dbas_txt/mascotsg.htm

But I don't see any 1937-1938 Caddies on this site with the red ring on the tires.

http://img299.imageshack.us/my.php?image=movielv8.jpg
thx