Vintage Bell & Howell model 253 AR 8mm Film Movie Projector

I have an issue with my brand new (old) 8mm film projector In which the film doesn't feed. Does anyone here have an idea why it doesn't? : r/projectors

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BELL & HOWELL 253 AR 8MM Movie Projector 500 W Lamp Working £56.52 - PicClick UK

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