Hi, Art. Per your comment:
"First and foremost, just because a grading company has not graded a confirmed T206 front/back combination doesn't mean its unconfirmed."
You're missing the point, wittingly or otherwise. In the matter of the occasionally rumored forest green Sovereign 350 George Davis (a.k.a. the Loch Ness Monster...pun intended), the issue at hand is whether T206 Resource and SGC can back up their claims of its existence with proof or, short of that, a mere scintilla of evidence. I have asked them both. SGC told me at this month's Philly Show that it cannot, and that the entry could be a data error. The mandarins at T206 Resource haven't replied to my e-mails, or to the pointed (but unfailingly polite) questions put to them on this board.
It is well known there are glaring inaccuracies in SGC's and PSA's population reports. So this wouldn't be the first time. Here are two examples, to illustrate.
Go to the SGC pop report, type T206 for the set name and Spike Shannon for the player name. Hit the search key. You'll see a lone Piedmont 150 listed there, graded SGC 70. Under set name it says: "1909 Piedmont Cigarettes." Except, as most of us know, that's impossible, because Shannon is part of the 350-only series. Or go look up the lone Molly Miller with the Sweet Cap back that's listed in PSA's pop report. For those who don't recognize his name, Miller is a Southern Leaguer, and Southern Leaguers weren't printed with Sweet Cap backs.
Absent facts that provide evidence of confirmation, it seems to me far more likely that T206 Resource and SGC both erred on this occasion. So, for the time being, I'll continue to classify the putative forest green Sovereign 350 George Davis on my own checklist as "unconfirmed." (Thank you for your concern, Art.) The same goes for the other cards Luke listed in his fine, well-researched article, which I again encourage everyone to read here:
http://www.thatt206life.com/2017/03/...gn-350-a-hoax/
Regards,
Jon