It appears that there is a die chip within the mintmark. It doesn't look like a completely "filled" mintmark, so I guess only part of the post on the die broke off that creates the center hole of the D.
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
In Memory of Tootallious 3-31-1964 to 4-15-2020
In Memory of T-BOP 10-12-1949 to 1-19-2024
























