I have the three chips below, each one is same except for the coloring which I'm told was done by a Circus Circus employee using a marker so they could track where the chips came from. TCR # N6121 is the one with no marker marks (now saythat fast 5 times). Which one is N6121.D, or are they both N6121.D?

I bought these chips from Terry Shaffer, who incredibly had a box of them, well it was a shoebox with a bunch of them in it.