Reverse is a 66, but there are hits on Abe's nose that I find distracting enough along with the hits on the date, and the marks in the field that I think will hold it to: MS65
To me, both sides of this design are very well-executed. No attempt to make the bust more "photogenic". Heckuva coin!
I'm not a qualified evaluator, but i have seen some dreadfully hacked-up coins with MS numbers. This one is super clean to my untrained eye.
The reverse is extremely nice, I'd call it 67. The obverse is a 65 I think. I think the multiple hits on the date are the primary holdback from a 66. So, I think it's a 65. Quite nice photographs BTW. How did you get that little gray edge shadow effect?