How many movies have Andrzej Herder and Janina Niedźwiecka collaborated on?

They have worked on 6 movies together! Their first movie together was Samson (1961) while their highest rated movie together was How I Unleashed World War II, Part I: The Escape (1970). They have not worked together since The Hourglass Sanatorium (1973). They are most known for their war films together.