Longshot - 1956 Studebaker Loewy? That's all I've got.
That's a good long shot, because it's (almost) his the bullseye!
It's actually a 1957 Studebaker proposal but is by Raymond Loewy, or at least by Loewy Associates, probably not the Man Himself!
Well done; you're not going to be able to answer many more Rookie puzzles!
I'll post a couple of other shots of it later.