I've got some PCGS 65's & 66's sitting here that don't look anything near that nice. I'm voting for 68.
Dead full strike and nearly mark free. I think even PCGS would give this a 67 were it not for the tiny marks and not the greatest luster. Yes, PCGS only gave it a 66 and I believe that is the proper grade.
Another round with no significant changes. rzage and mark_h flip flopped as did swhuck and Cazkaboom. Top 10. Columns are rank, name, average, and number of guesses. ldhair 0.308 28 ddoomm1 0.375 26 BadThad 0.415 43 Leadfoot 0.429 44 Shoewrecky 0.500 42 jcakcoin 0.543 48 rzage 0.576 35 mark_h 0.591 46 swhuck 0.600 42 Cazkaboom 0.625 50