This is a late die state of the N-1 die marriage which is an R.1. The obvious obverse die crack and the flow lines to the rim on the obverse are very cool. The double punched I and the low L in LIBERTY are diagnostic of this variety.
As far as grade I give this coin an EAC 8 which would correspond to an VG-10 market grade.
1831 N-1 R.1 LDS 8/8