How many movies have Dušan Schaffer and František Strangmüller collaborated on?

They have worked on 10 movies together! Their first movie together was Komu patří pohár? (1960) while their highest rated movie together was OK 12 startuje (1961). They have not worked together since I Wouldn't Leave Tereza for Any Other Girl (1976). They are most known for their family films together.