A woman's painted portrait and a post card with a sketch of a woman's hand holding a Chianti bottle are the main clues used by the Scotland Yard to solve a string of murders connected to a diamond-smuggling ring.
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Cast of Postmark for Danger
Terry MooreAlison Ford
Robert BeattyTim Forrester
William SylvesterDave Forrester
Josephine GriffinJill Stewart
Geoffrey KeenInspector Colby
Allan CuthbertsonHenry Carmichael
Henry OscarJohn Smith
William LucasReg Dorking
Terence AlexanderFenby
Bruno BarnabeItalian Detective
Eric CorriePilot
Jack HowarthHotel Porter
Stuart SaundersSgt. Haines
Marianne StoneReceptionist
Frank ThorntonPolice Photographer
Raymond FrancisPolice Inspector - Interpol Division
Sam KyddBill, the Telephone Engineer
Robert Raglan(uncredited)
Ian WilsonDorking's Customer (uncredited)
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