going through some old posts as I havent been around for a while.
I have a few of these ca1948+ 2sided premiums (5"X8" exactly) with the same font, but these are not blank backed, they have a player on each side, all are machine cut exactly the same size and show age on edges.
besides the ones pictured below, there are 6 more ... Jackie Robinson/Dick Wakefield, Hartnett/Frisch, Dykes/Feller, TWilliams/Durocher, DDean/Hornsby, WJohnson/HWilson
I have never seen others or dups