You say the maker is well-known, but not one of....
Ford
Miller
Chrysler
Stutz
Studebaker
Chevrolet
Buick
Hupmobile
Auburn
Willys
Hudson
Duesenberg
Packard
There were many US makers at this time (I'm guessing 1928/30) but most couldn't afford to go racing because of the Depression. I'm frustrated I can't get this.
Dodge?