How many movies have Birger Österberg and Catti Edfeldt collaborated on?

They have worked on 4 movies together! Their first movie together was 1939 (1989) while their highest rated movie together was Die Tote im Goeta-Kanal (Roseanna) (1993). They have not worked together since Polis polis potatismos (1993). They are most known for their drama films together.