This is indeed the same card that was sold in a Sterling Auction for roughly $4K as SGC Authentic here:
Link. When I asked Brian about this card, he guessed that it was Authentic due to a very slight trim on the bottom edge. If you compare the photos from the Sterling auction to probstein's auction, you can see that it is the same card. Therefore, the card is a 1/1 because it is the "only" card in both the SGC and PSA pop reports.