How many movies have Stavros Xenidis and Vasilis Vasileiadis collaborated on?

They have worked on 13 movies together! Their first movie together was Εισπράκτωρ 007 (1966) while their highest rated movie together was The Strongman Who Became a Lamb (1967). They have not worked together since Ένας τρελός τρελός αεροπειρατής (1973). They are most known for their comedy films together.