

with Crazyb0. It looks like it was in a folder that allowed the face (obverse) to be exposed somewhat to turn brown and the back (reverse) was more protected but moisture got trapped in there and caused the deterioration you see. I'm 99% sure it's the result of improper storage.
There may have been other things involved as well.

In Memory of Crazyb0 12-26-1951 to 7-27-2020
In Memory of Tootallious 3-31-1964 to 4-15-2020
In Memory of T-BOP 10-12-1949 to 1-19-2024