How many movies have Erkki Karu and Konrad Tallroth collaborated on?

They have worked on 4 movies together! Their first movie together was Rakkauden kaikkivalta – Amor omnia (1922) while their highest rated movie together was Koskenlaskijan morsian (1923). They have not worked together since Suursalon häät (1924). They are most known for their drama films together.