4 Schlüssel 1966
- Released: 1966-01-14
- Runtime: 120 minutes
- Genre: Thriller, Crime
- Stars: Günther Ungeheuer, Horst Michael Neutze, Jürgen Draeger, Walter Rilla, Monika Peitsch, Hellmut Lange, Paul Edwin Roth, Ellen Schwiers, Ida Krottendorf, Joseph Offenbach, Hanns Lothar, Christa Siems, Heinz Engelmann
- Director: Jürgen Roland