Bread guillotine. I believe this is 1950s era. The "RAADVAD" marking refers to a Danish kitchen tool company. Gorgeous tool that positions the loaf perfectly, and I really like that connected bread holding tab at the bottom.
Of course, the bread loaf seen here does seem rather dense. I'm not sure exactly how this would work with a loaf of airy white bread.
However, when I see this beautiful video, and then search Amazon for "bread slicer", these plasti-natural-bamboo gimmicks compel me to entertain analogies about the breakdown of society.
Bread loaf wrapping machine GIF
3D cutting board craze examples
Cake cutting tools - GIFs and photos
Japanese noodle cutter - GIF