During pre-production, the film was promoted as an adaptation of an Edgar Wallace story. Less then two weeks before principal photography, the West German companies Rialto Film and Constantine Film (who were co-producing the movie) pulled out for unknown reasons, and any reference to Wallace was removed from the final film. The German connection is still reflected via Günther Stoll and Wolfgang Preiss, both stars of Rialto's Wallace adaptations (better known as 'krimi' films).
Hooker smokes Astor cigarettes.
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Top Gap
By what name was The Bloodstained Butterfly (1971) officially released in India in English?
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