A 35mm film strip viewer (a toy?)  special ready film strips were sold for that viewer: children stories with titles in a 20 frames and 4 leading and trailers frames.  B/W painted - film ininflammable!  (an example at top showing as it's seen thru the viewer)

A knob is hand turned thus turning the film for each frame to be viewed. more like a magic lantern then a moving film...
               A look inside               The viewer in use

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