Sorry about the delay!
As far as I know, it's not related to Esso Gunnarsson - who seems to be mainly connected to motorcycles, right?
And its name is not Buris.
Let me share a few clues: It's connected to a small-scale manufacturer of racing cars, was driven by one of the great racers of its time, and it carries a specific name that it shares with a quite common car model of today.