He also won the competition of the General Swiss Post Office for new stamps and was the runner-up in the audience vote in 1970.
In the catalog for the auction of May 12, 2008, Swann Galleries New York described the poster: "It is impossible to look at this image without seeing a resemblance to Roy Lichtenstein’s early graphic work (and arguably Andy Warhol.)
However, this poster precedes Lichtenstein’s first Pop Art creations by nearly ten years…."
"This poster is a proto-Pop masterpiece that stands as an exceptional vanguard to the Pop movement of the 1960s."
Schweizerische Nationalbibliothek, Graphische Sammlung, Bern - Swiss National Library, Graphic Art Collection, Bern/Switzerland) Museum für Gestaltung, Plakatsammlung, Zürich - (The Museum of Design, Poster Collection, Zürich/Switzerland) Schule für Gestaltung, Plakatsammlung, Basel - (The Basel School of Design, Poster collection, Basel/Switzerland) Bibliothèque de Genève - (The Public and University Library Geneva/Switzerland) Akademie der Künste Plakatsammlung, Berlin - (The Berlin Academy of the Arts, Poster Collection, Berlin/Germany)