That's pretty interesting looking. I agree it's not a "vise-job" or penny smashing. There is no apparent damage to the shield. Somehow, an
LMC reverse that mostly overlapped the
LSC reverse left its image.
I don't know exactly how but, it did. Maybe it involved glue or residue that caused uneven toning and was later removed?

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