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Seven Keys: A convict is bequeathed a set of seven keys by a fellow prisoner. After discovering that the deceased was an embezzler who stole £20,000 that was never recovered; he sets out to find the cash after finishing the last three months of his sentence. However he must first solve the mystery of which locks the keys fit, and run the gauntlet of the police and a number of gangsters who are after him and the money.
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It features Jeannie Carson, Alan Dobie, Delphi Lawrence, John Carson, Anthony Nicholls, Robertson Hare, and Colin Gordon.
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The Edgar Wallace Mysteries are a series of British second-feature crime drama thriller mystery films, which were originally released in cinemas between 1960 and 1965. The films were loose adaptations of Edgar Wallace's stories, set in contemporary settings.