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The Clue of the New Pin is a 1929 all-talking sound British crime film directed by Arthur Maude and starring Benita Hume, Kim Peacock, and Donald Calthrop. The soundtrack was recorded using the British Phototone sound-on-disc system. It was made at Beaconsfield Studios. This film is important historically as being Britain's first all-talking feature film produced entirely in Britain. The first all-talking British feature production, a film entitled Black Waters, had been produced in the United States due to a lack of sound recording equipment in Britain. imdb.com