How many movies have Sal Borgese and Sergio Sollima collaborated on?

They have worked on 8 movies together! Their first movie together was The Rebel Gladiators (1962) while their highest rated movie together was Agent 3S3: Passport to Hell (1965). They have not worked together since The Tiger Is Still Alive: Sandokan to the Rescue (1977). They are most known for their adventure films together.