Konica AUTO-UP CA 100-50cm

This is a close-up filter made by Konica.
AUTO-UP CA 100-50cm
It seems to have been found while organizing my room.

The main unit is missing, so I have not been able to test its operation.
The case is not included. It will be sent wrapped in cushioning material.

I have disassembled and cleaned it for this listing, but there are some dust particles and scratches. (Photos 5 and 6)
They only appear depending on the angle of the light, so I believe they will not significantly affect image quality, but I cannot be sure as I haven't been able to test it.

Please consider it.