Back about 25 years or so ago I bought a modest collection of what appeared to be an original T206 find- maybe it had 200-250 cards- and after I sat down to go through each card carefully discovered two Drum backs sitting adjacent to each other. In the eighties and nineties I bought many original collections, but this is the only one that ever had a Drum, much less two of them.
Ted- I think you bought one of them so I'm guessing you remember both cards. Sadly, I remember neither player.