Die Abenteuer des Prof. Gütterli

Die Abenteuer des Prof. Gütterli, launched in 1937 by Schweizerspiegel-Verlag, is a single-issue Swiss comic that introduces the titular professor through a brief, self-contained adventure. While its run is limited to one installment, the series holds a place in early European comic history as a standalone curiosity from a pre-war publisher.