Quote:
Originally Posted by obcmac
If we're putting fake backs on the list, it's going to be quite the list ;-)
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Blue Old Mill might be debatable. I don't think I see any others that are questionable? However the OP says the backs might be found on ebay at any given time? That list is not those....
and as for Greiners, I think of them more as F-Unc but who am I to say? There are very low known populations of most of those..E94 has 10 different overprints known plus a few very minor variations.