Because its a slow day at work, here is part of a master back run, in order of what I generally deem the toughest (left to right). I can only add 18 pics, so that's why I have limited this to 18 backs. I am including all color variations as well as T213-1, T215-1, and blank bc they were distributed during the 1909-11 time frame, have the caption in black ink and contain the same fronts as "accepted" T206s (plus, I think they certainly could be considered T206s).
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