Pentax Digital data M

I am not familiar with the item. The battery compartment is very clean. I tried with a few spare batteries and the battery checks powers up, it cycles through modes, data can be changed.

The back itself is in good conditions and it’s closing when attached to a body (checked).
Other than that I can’t say. Possibly an item for a collector or completionist.

It should work with the ME Super and ME (it came on one), probably also other M-series cameras.