HASSELBLAD Focusing Screen Genuine 500cm

This is a Hasselblad focusing screen. I am selling it because I replaced it with a different screen.
I have used it carefully for many years, and it has been stored in a dry cabinet when not in use.

There are adhesive stains inside the screen due to age-related deterioration, as shown in the last photo. It is not mold, but please judge the condition from the photos.