How many movies have Kurt Nachmann and Roy Black collaborated on?

They have worked on 3 movies together! Their first movie together was Hilfe, ich liebe Zwillinge! (1969) while their highest rated movie together was Kinderarzt Dr. Fröhlich (1972). They have not worked together since Kinderarzt Dr. Fröhlich (1972). They are most known for their comedy films together.