Woodgrain toning makes it tough; also the presence of a hairline or two that I suspect are on the plastic and not the coin. I'll go 63 RB, but 64 wouldn't surprise me. It really looked like a CuNi to me at first.
Pretty coin. To me it's a 63 RB. But I've seen these services be so conservative with color, it wouldn't surprise me if they called it a BN. I don't agree, but I've been "wrong" with these many times.
Tom you and a few others in the 63 RB camp are probably correct....the 1900 posted is a 63 RB., in hand I say its a 64 but lacking high luster and the wood grain is a like minus 1 for TPG on specimens as Alan posted has posted here. I personally like woodies....in my eye it is harder to see through the grain effects on the eye,and realize that spotless non toned coins of yesteryear are still prefered over those whos have aged with time. As its a slam dunk....looking at a clean clear surface.
