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
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