Posted By:
Bob LemkeI don't recall ever seeing this set in my tenure with the Standard Catalog. The Philadelphia A's Historical Society was real good about keeping us apprised of their output, so I don't think it originated there.
I also had a good source for data about early (1970s) show issues from the Philly Show guys. but don't believe they were doing cards by the mid 1980s.
I'd guess it's a collectors' issue, but as I said, it's new to me.