How many movies have Jorge Busto and María Eugenia San Martín collaborated on?

They have worked on 6 movies together! Their first movie together was El jinete negro (1961) while their highest rated movie together was Santo and Blue Demon vs. Dracula and the Wolf Man (1973). They have not worked together since Santo and Blue Demon vs. Dracula and the Wolf Man (1973). They are most known for their horror films together.