Eumig 8mm Movie Projector
It claimed "The world’s first 8mm projector with an iodine-quartz lamp".
Note the mechanics on the back to thread the tape from a reel-to-reel tape recorder which the swinging arm kept varying the speed of the projector and hence provided synchronised sound to your movies.It was fairly successful too. A little later sound tracks were added to the edge of the film. And a little later after that came "Super8" which had an optical sound track on the edge of the film.