It was filmed in early Spring, 1969. The film was first released theatrically in Germany (as Dracula vs Frankenstein) on February 24, 1970, and in Spain (as The Monsters of Terror) on August 28, 1971.
The film was shot in early Spring, 1969. The movie premiered theatrically in Germany (as Dracula vs Frankenstein) on February 24, 1970, and in Spain (as The Monsters of Terror) on August 28, 1971.