This gizmo looks similar to the Polaroid camera I once used to 'capture' the screen of an oscilloscope.
However, I seem to remember that the frame going from the camera proper to the rectangular mask for the screen was covered in a shroud to exclude ambient light.
I would then digitize the output by counting the screens grid lines on the resulting photo.
That was 45 plus years ago... ugh! Thus, I could be completely mistaken.
It's a polaroid copy camera. Looks like it's set to photograph whatever you put in the rectangle underneath. The stand holds it the proper distance from whatever you're photographing. Like @Kino said, it's likely just for documents - possibly even a particular kind of document. It doesn't have a ring flash like the polaroid evidence camera. It appears fairly simple. It's not particularly useful right now since there's no film available for it.
Just a heads up - us moderators are floating the idea about combining all your "what do I have here?" threads into one single thread.
Otherwise you may find it nearly impossible to find information later.