How many movies have Roberto Muñoz and Rogelio Agrasánchez Sr. collaborated on?

They have worked on 4 movies together! Their first movie together was The Castle of Mummies of Guanajuato (1973) while their highest rated movie together was The Mansion of The 7 Mummies (1977). They have not worked together since The Mansion of The 7 Mummies (1977). They are most known for their horror films together.