Mamiya Prism Finder for M645, 1000S Cameras
This is actually a metered finder but the meter doesn't work. It's still a beautiful prism finder.
It shows moderate wear. The meter appears to be working inside the prism but is not communicating that to the body. As a result when the body is set in AE mode the shutter on the body will select an incorrect speed. The glass has a few cleaning marks and dust specks.