I thought I read years ago about D's being stamped over S mint mark. Its a shot in the dark, I know. Lol
Would expect to see more of the S. At least that's what I've been told. MD is my uneducated guess here. Let's see.
It look damaged to me. As you can see it took a hit and the metal got push to the side. PSD to me. Wait, for some others.
It did happen in 1949 and 1955. For some reason in 1954 there are S/D's. This does not look like a D/S and why would it even happen in 1958 three years after the S mint closed and four years after they stopped striking five cent pieces there. In 1955 when it was decided that the S mint would be closed and no five cent pieces would be struck there that year, Philadelphia took the S mintmarked rev dies they had on hand and repunched them with D's and shipped them to Denver. The chance that one of those dies would still be around three years later would be effectively zero.
