65 RD, though I agree that color based on those pix is just a guess. (So is my grade, but well, I suppose it's a semi-educated guess, at least.)
Interesting twist on it. I didn't consider it might be a proof. Still not entirely sure of that, so I'll stick by my earlier guess. But you might be onto something. Speaking of IHC, I like your new avatar. Looks familiar.
On the fence here. Looks nice but looks cleaned to me and the diamonds are not pronounced. Just my thought . 58 sorry