How many movies have Ernesto Gastaldi and Ivan Rassimov collaborated on?

They have worked on 4 movies together! Their first movie together was Taste of Vengeance (1968) while their highest rated movie together was The Strange Vice of Mrs Wardh (1971). They have not worked together since Your Vice Is a Locked Room and Only I Have the Key (1972). They are most known for their horror films together.