Beauty! If this is PCGS, I'd imagine they'd said MS64. In my opinion, they always seem to give CC Morgans +1 simply for being from Carson City. If this coin was minted elsewhere, I'd imagine it'd grade MS63.
+1 I think it should be 63, but I think it has a nice enough look to get that CC benefit of the doubt.
I would agree with that, if submitted today it would probably be 64. By rights its a 63 today, and I also would not be surprised if @toned_morgan were right if its in an older slab. YES, the marks are in PFA, however, look how clean the rest of the coin is. CCs are usually very baggy, this is better than average.