If it was intended as CRT-camera the focus would be fixed in that missing lens/shutter assembly.
So it was intended for a different use?
no, I don't think so. polaroid used these bodies for different purposes. in the beginning it was for dental cameras and close-up museum work. they also sold them for criminal investigation work. with the help of the above mentioned finder and the 5" lens you could just make a close portrait of a suspected person.