How many movies have Heinz Willeg and Konrad Georg collaborated on?

They have worked on 6 movies together! Their first movie together was When Night Falls on the Reeperbahn (1967) while their highest rated movie together was On the Reeperbahn at Half Past Midnight (1969). They have not worked together since Auch ich war nur ein mittelmäßiger Schüler (1974). They are most known for their crime films together.