It's been a while, so I think it's safe to "out" this ebay auction from a couple of months ago. Not sure how many saw this, but obviously enough that the owner was bombarded with BIN offers. The owner ended up pulling the item and reportedly has now consigned it to an unknown auction house. When it first went up on ebay, the owner had no idea what he had. This is the 1865 Atlantics of Brooklyn. It is shown in Mark Rucker's "Base Ball Cartes" book with a "Champions of America" attachment to the bottom of the image. Unless others have surfaced recently, the only other copy (the one shown in Rucker's book) is in the Library of Congress.
Rob M.
Brooklyn CDV.jpg