How many movies have Ede Dülfer and Emil Hachfeld collaborated on?

They have worked on 1 movie together! Their first movie together was Die optische Industriegesellschaft oder darf's ein viertel Pfund mehr sein? (1983) and was their highest rated movie together. They have not worked together since Die optische Industriegesellschaft oder darf's ein viertel Pfund mehr sein? (1983).