How many movies have Petar B. Vasilev and Valentina Borisova collaborated on?

They have worked on 7 movies together! Their first movie together was The Traces Remain (1956) while their highest rated movie together was Farsighted for Two Diopters (1976). They have not worked together since Farsighted for Two Diopters (1976). They are most known for their comedy films together.