How many movies have Ernst Waldbrunn and Kurt Nachmann collaborated on?

They have worked on 9 movies together! Their first movie together was Ja, so ist das mit der Liebe (1955) while their highest rated movie together was Zwölf Mädchen und ein Mann (1959). They have not worked together since The Landlady Also Likes to Play the Trumpet (1970). They are most known for their comedy films together.