How many movies have Erkki Mertanen and Severi Seppänen acted in together?

They have worked on 2 movies together! Their first movie together was Isaskar Keturin ihmeelliset seikkailut (1960) while their highest rated movie together was Tähdet kertovat, komisario Palmu (1962). They have not worked together since Tähdet kertovat, komisario Palmu (1962).