I tried to find the thread where a similar coin was posted. But that same night, searching a couple of rolls I came across the same thing, same possible date-1991. Puppy hair-sorry.
Looks much different once posted here enlarged. Does look vaguely like a possible 4. My eyesight is wrecked.
courtesy LCR.. If things went according to plan all proof cents dated 1994 and on would have the Wide AM design, and all business strikes would have the Close AM design. Naturally all 1959 - 1992 cents should have had Wide AM designs on both proof and business strikes.