While I can't see what is going on with the actual mint mark, what looks like an S on the jacket is most likely just damage that resembles an S. 60 years of circulation can cause lots of dings and nicks, and your brain can make a bit of damage look like something else (like pictures of Jesus on burnt toast). Closer pictures would be better, and put them right side up, it's hard to compare coins when one is upside down.
Dave
Dave























