this one would be no-mint mark making it a "P". and I would not put it under "MS" but close enough to VF-AU with that shine and so little wear. :) 14 GIN, that would be long gone if it was the case. watching this one as well !!!
It looks like it has a "D" mint mark above the Bell on the reverse side of the coin. Its hard to see, but that's where the mint mark on Franklin Half Dollars are...