I can't really see the rims well enough. The slab is hiding much of them. I was looking at the surfaces as well. No mater what, it's a really nice coin.
The pics are throwing me off a little. I am gonna say pf64. Cant really see the rims but it is real flashy. Nice Buffaloe. By the way tags don't seem to be working.
I think it could go MS66. The glare is the only limiting factor for me, I can't see the detail well as I'd like. The surface does look a little on the "proofy" side, too. It's a handsome bugger you got there, Rod Serling.