How many movies have Günther Ungeheuer and Horst Michael Neutze acted in together?

They have worked on 4 movies together! Their first movie together was Polizeirevier Davidswache (1964) while their highest rated movie together was 4 Schlüssel (1966). They have not worked together since General Oster – Verräter oder Patriot? (1970). They are most known for their drama films together.