I was the one who spotted the ornate B at the Met. It was in one of the books of cards itself stamped all over the pages, not on the backs of the cards [they are glued down and you can't see the backs except for one exemplar per issue]. As I recall. the B was stamped multiple times all over the album and was interesting enough that I sketched it on the notes I was making. When I saw the stamped card years later I remembered the B from the Met.
There is a good thread on this issue on the nonsport board:
http://www.network54.com/Forum/52660...dick+overprint