A rare 1968 original Mexican movie poster for Blue Demon Contra Las Diabolicas (Blue Demon versus The Diabolical Ones), A Mexican action thriller starring the Luchador legend, Blue Demon, who starred in a series of Lucha films between 1961 and 1979, often alongside in-ring rival El Santo. His in-ring career began in 1948 and stretched for 41 years until his retirement in 1989.

This film is about an organised crime gang that uses a group of female fighters to smuggle precious stones against their will. When they realise what's happening, they are murdered by a fake Blue Demon. The real Blue Demon discovers the facts and decides to take action.