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.
