Posted By:
Jay MillerFor what its worth it appears from the images that I have seen in the catalog that all of the cards have gray cardboard backs. If this is true it would also place the cards in late 1948 at earliest. The 1948 football set was issued in two series before the completion of the 1948 season. The first series has a tan back. The second series comes with both tan and gray cardboard backs with the later coming from the back part of the print run when they switched cardboard. If the baseball set is gray backed it followed the football set. The 1949 football set is all gray backed.