T206 upside down backs "should they be on the back run?"

[Blitzu]

I say no. Everything on the list now is substantially different and unique from all the rest. An upside down back is nothing more than something that's already on the list. All the rest were printed differently including the 213 and 215 coupon/Red Cross. The only one on the list that wasn't printed differently was the blank. I still feel the blank belongs on here because it was substantially different and unique from all the rest. Otherwise if we included upside down backs, why not ghosts, or double backs? If that were the case many of those would be 1 of 1's and sort of defeat the purpose. Plus the number of variations would be extremely high.

Plus, one last point to ponder, how can you ever prove if the back or the front was printed upside down? For all we know the front could have been the mistake.