Yes, it's a process camera. In my experience the back of the camera was normally built into the wall of the darkroom. I'm a printer, and haven't seen one in many years. I once had a smaller vertical one (like an enlarger) that I tried unsuccessfully to sell, then give away, about 15-18 years ago. I finally just put it in the alley behind my shop - it was still there when I moved about five years later, although someone had taken the lens.