@peartree – Maserati? Manufacturers Fangio was driving for at the time of his championship wins.
You got it, though @bradley13 got it right 3 minutes earlier than you.
I tried to make it harder by not putting the 4 manufacturers and have you guys try to guess what’s the meaning. The correct answer was indeed Fangio who won with 4 different teams in that order (not that it matter) it’s a record that’s hardly going to get bettered.