How many movies have Oldřich Velen and Roman Hloch collaborated on?

They have worked on 13 movies together! Their first movie together was Mykoin PH 510 (1964) while their highest rated movie together was Co je doma to se počítá, pánové... (1980). They have not worked together since Příhody pana Příhody (1983). They are most known for their comedy films together.