Masked Man against the Pirates (1965 George Hilton)
Original title: "L'Uomo Mascherato".  Pirates capture a Spanish ship. After having landed on an island, they try to sell the surviving crew, especially the women. One of them is protected by a pirate who's gained her as a prize for having saved the captain's life in the battle that ensued. Suddenly a man masked in green arrives to do justice.  Starring George Hilton, Tony Kendall, Gina Rovere, and others.  Directed by Vertunnio De Angelis.  Dubbed in English, with Greek subtitles