How many movies have Harald Dietl and Kurt Nachmann collaborated on?

They have worked on 4 movies together! Their first movie together was Vier Mädels aus der Wachau (1957) while their highest rated movie together was Jerry Cotton: The Trap Snaps Shut at Midnight (1966). They have not worked together since Frau Wirtin treibt es jetzt noch toller (1970). They are most known for their comedy films together.