Mamiya HM401 Film Back for 645 AF AFD Cameras *** READ ***
It comes with a Dark Slide, Film Insert
It shows signs of use.
This back has a couple of issues:
1) The Up button which needs to be pressed when adjusting the ISO is missing. The operation can still be done by inserting a pointy object instead.
2) The battery cover is damaged. A battery is only needed for operating the back when not attached to the camera; while on the camera it takes power from the body.
Aside from these issues the back was tested and works well. Film loads, advances, and rewinds properly.