RMW,

I'm horrible at grading copper, just take a look at my Farthing sets. But if I was to take a poke at it I would say MS64. 

Attaboy WD!I think I have a shot at that but personally think it's either a 63 or 64 RB,  I think the obverse is a strong 64 if not a 65 but the reverse does have some contact in the open fields on the right hand side. They are there but aren't gouges or anything like that. So it's gonna be close.

For Unc Coins it seems that surface quality is the most important to the graders , presumably as that is easier to quantify than quality of lustre and strike , which requires more specialized knowledge of the type.This aspect is more of an issue with World Coins than US Coins because of the sheer variety of types out there. We talked about British  Maundy issues as an example of that, where all issues from sometime in Victorian period were all produced to a PL Standard , yet you will see some graded as PL and others not.

I consistently get reminded (by NGC) that grading mint state coins is not a skill that I possess. 64 looks doable to me. The strike is much better than some others that I have seen.

Thanks Chris B. Yeah I think its doable but should be close. Obverse is a no doubter. The reverse??

And there is no doubt this is the high tide variety.