How many movies have Jürgen Büchmann and Klaus J. Merl collaborated on?

They have worked on 3 movies together! Their first movie together was Rockys Messer (1967) while their highest rated movie together was Das Geständnis eines Mädchens (1967). They have not worked together since Straßenbekanntschaften auf St. Pauli (1968). They are most known for their drama films together.