the 83-O is known for Average to Softer strike. this one is AVG+ and a nice strike. there are no scratches on the coin that would drop this coin a full grade. everything appears to be just contact marks. MS64 nice lustrous NO minted coin.
I am just learning here but what looks to be a nick on the Obverse rim at the "M" in Unum. Is that a nick and would that impact grade? or is that not considered to be important and the field and devices are the key? beautiful coin and I will say 64