This photo is one of a series depicting the Tour de France publicity caravan in 1938. You can see the Super Champion van lurking just behind the 'La Vache Qui Rit' bus.
I have a strnge feeling that 'La Vache Qui Rit' still has vehicles in the Tour caravan to this day. Those cows just keep on laughing...
(Source gallica.bnf.fr/ Bibliothèque nationale de France)