Here is what I know about these cards. I have only seen 17 total but I believe there might be 18 or 20, evenly split between the A's and Phillies. They are not always blank backed. I have seen a few examples of an ad stamp on back. My only one is the Merrill May below. Really have only seen a handful in the last 20 years. A member here did have an opportunity to buy some not too long ago if i recall but not sure it ever happened.
Joshua (never count out the members!)
