A scientist discovers the formula of a particular resistant steel, and a spy ring from an enemy power sets after him to obtain it.

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Main Cast: Peter van Eyck, Mikaela Wood, Klausjürgen Wussow, António Vilar, Corny Collins, Letícia Román

Director: Julio Coll

Writers: Dick Haskins, Helmut Harun, Julio Coll, José Germán Huici

Editor:

Cinematographer:

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