If you can, get full-coin pics of both sides. That will help to determine if anything else is going on.
I am still fairly certain it is
PMD, but am open to other possibilities.
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