How many movies have Ivo Vrzal-Wiegand and Ladislav Chroust collaborated on?

They have worked on 3 movies together! Their first movie together was Valčík pro milión (1961) while their highest rated movie together was Jak se krade milión (1967). They have not worked together since Jak se krade milión (1967). They are most known for their comedy films together.