There were four Zorro movies released in 1968
I Nippotti di Zorro... 1968... Italy Dean Reed
Zorro Il Cavaliere della Vendetta... 1968 Italy/Spain... Charles Quiney
El Zorro la Volpe... 1968... Italy George Ardisson
AND this one, a classic spaghetti western
El Zorro ... 1968 Italy ....Guido Zurli