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Visit to Bletchley Park and South Coast - Friday 19th August 2011

20. In among the exhibits was a 9.5mm projector. 9.5mm was an amateur film format introduced by Pathé Frères in 1922 as part of the Pathé Baby amateur film system. The format uses a single, central perforation (sprocket hole) between the frames, as opposed to 8mm (and most other film formats) which have perforations down one edge. The single hole allowed more of the film to be used for the actual image, and in fact the image area is nearly as large as 16 mm film. The format was short-lived and used mainly for distributing commercial films for private use.
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