This is a laser cut to make a Möbius ring out of multi layer plywood. It consists of 3 equal parts that together form a ring in the shape like in the picture.
Red means cut, blue means mark.
The 3 parts have to be connected by what I know as 'book screws'. Screws that fasten paper through holes in the paper. I could not find a good translation from the Dutch word boekschroef.
Beware that the model can be constructed the wrong way around so that it will look differently.