The success of these movies originated a whole new genre later known as the "Spaghetti Westerns" where once again the harmonica plays a dominant role (there is even a character by the name of Harmonica in Sergio Leone's movie Once Upon a Time in the West) in the music of Ennio Morricone, played on the harmonica by Franco De Gemini.
The popularity of these movies sparked the creation of a new genre called "Spaghetti Westerns," where the harmonica is prominently featured, as seen in Sergio Leone's film "Once Upon a Time in the West." Ennio Morricone's music for this genre often features the harmonica played by Franco De Gemini.