KM-Y6a. Bitkin 311. Ekaterinenburg Mint. AMAZING piece, splendid luster, a hue of blue and light reds, shimmering over reflective fields. The relieff is frosty, almost prooflike. This piece will fit an advanced collector of Russian copper coins very well. We have found no comparable specimens of this date, only a MS63, which this presented specimen EASILY surpasses, by a mile.Tied finest at NGC, Cert 2907734-028