I tell ya...grading above MS64 is really splitting hairs as we know that the differance between a MS65 coin and MS64 could be serious dollars.
I have studied both Lincolns and Morgans and when it comes to grading them MS64 and above, for me it has been really nerve wrecking. For instance, San Francisco minted Morgans graded MS64 would grade MS66 if it had a New Orleans mint mark. Why? Quality control in New Orleans was poor where attention to deal was the norm in San Francisco. Now a "S" mint MS65 looks much differant than a "O" mint MS65. Same grade, but really differant coins and strikes. Now I have to learn MS grades for each of the P, S, O and CC Morgan mints
Take Lincolns. Quality control in the 20's was poor. Soft strikes were the norm. What would be MS65 during the 20's would be MS62 in other years. AAHHHHHHH! Shell casings were used after WWII to make Lincolns...another factor to considered.
OK...I have some Lincolns slabbed by the
TPG's and I line them up. MS64, MS65, MS66 and MS67. I look at the color, luster, bag marks (if any), and the strikes of each grade. Then I line up other MS64 coins and they look just as good as some of my 65's or vice versa.
Yeah, yeah...buy the coin, not the slab. Learn to grade, but when you are trying to learn and establish yourself a true MS64, 65, 66 and 67 grade in your favorite coins, it can cause "grading stress".
But I guess that is what makes the hobby fun...arguing my grade versus your grade.
