Close AM on the 1998-S and 1999-S is the ones to look for. On the 1993-S The
Close AM is correct on the proof. Note
Wide AM's that year.1994, was the start of the
Wide AM on the proof cents. 1994-S 2008-S. So your coin is normal: Here is a chart as what to look for these issues:

Save this image for your personal files. (So you won't have to look for it another time)