Rare cart copier for the Atari 2600. You can copy any 4-16k cat as long as you have a blank ROM cart (which are admittedly as hard to find as these copier machines are, but several homebrew websites still make things like this.) This specific machine came with one "blank" cart and sold additionals through mail order.
What makes this machine even stranger is the fact that it comes out of Eastern Europe (Poland,) which at the time was behind the Iron Curtain. Exported into Germany, Switzerland, Northern Europe, etc. Rare, rare, rare.