I know this thread is not drawing alot of T206 collectors but you could ask CFC1909. I know for a fact he collects AB backed cards and knows about the color difference. There was also a thread about the sovergeins a bit back. I have notices a few color vaiency with some of my AB backed T205's. I am hoping they were printed about the same time the T206's were and that maybe a flawed ink was to blame for it all. Are they valuable to me?? No but on a T206 they could be