Ok I have done extensive examination of this coin and I see the upper curve of an S with the Serif and also the bottom Serif protruding out he center West of he D. I refuse to believe the last 25 years I spent honing my variety error type skills were a waste of time.
Per the Red Book, none are listed as a variety. Yours looks like 100 + years of circulation or a hit occurred on the mint mark.
The part of the "S" you see is too tiny - even if the mint engraver just started to tap a mint mark with the wrong punch. Sorry.