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Open the back of the camera (with no film in it) and set say, a 1/10, ¼ and 1 second shutter speed and fire the shutter a few times. What do you see?
Is the shutter a rubberised roller blind that travels like a slit across the film?
Or,
Is it made up of a set of blades that open when you press the release?
You may be able to see a defect if there is one?
Cheers
Dennis
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