How many movies have Gernot Duda and Henning Schlüter acted in together?

They have worked on 3 movies together! Their first movie together was One, Two, Three (1961) while their highest rated movie together was Christoph Kolumbus oder Die Entdeckung Amerikas (1969). They have not worked together since Der Schuft, der den Münchhausen schrieb (1979). They are most known for their comedy films together.