1913-S/D Buffalo Nickel Type 2, Possible die error

The coin isn't in the best condition however the 1913 is clear. It is
also clear that it is Type 2 (hard line under buffalo) and that it is
either S/D. After looking at other coins it is crystal clear to me
that this coin is special. Over half of the coin (about 10 o'clock to
4 o'clock) their is a clear "extra border". The border is very
pronounced and it actually cuts through the S/D therefore making it
hard to distingish. The border also cuts along the bottom of the
F,I,T, and S of "FIVE CENTS". Is this really what I think it is? I'm
pretty excited. Thanks