Literature:
Müller-Brockmann 2004, Page 70.

Robert Hardmeyer's avant-garde poster shows the legendary “Güggel” of the former “Wöschi” in Zurich-Wollishofen. The motif revolutionized the world of advertising at the beginning of the last century and the humanized animal figure with the dominant lettering was the hallmark of the company building and the trucks of the car wash for decades.