Posted 06/11/2018 11:55 pm
In the 70's the mint(Frisco) had numerous punches used for their mintmarks. A few had damaged portions, as this with the lower post broken off. Later on (1979). The D was/known as "the dot) was just a blob, and proof coins had the "closed S" and "clear S" used and are considered type coins for a collector's sets!
