How many movies have Asrul Zulmi and Billy J. Budiardjo collaborated on?

They have worked on 6 movies together! Their first movie together was Amalia, Bachelor of Law (1981) while their highest rated movie together was Flower of the Nation (1982). They have not worked together since Arini II (Biarkan Kereta Api Itu Lewat) (1988). They are most known for their drama films together.