Chapman is one of the toughest cards in the Boston Store set and I assume is equally tough with the blank and CM backs. I know of an authentic BS and I have this blank back that I would love to trade for a Boston Store to match my set.
I am unsure if the rarity of the card is due to his death, being a Yankyee or some other factor, but I am curious to see what response we see on the boards.
James G