I was a contacted via my web site
www.1939baseball.com who asked if I knew who made them ? I remembered that the Centennial License Plate Ornament by the Hiss Stamp Company made the 4 inch square one but not a clue about the others. Another cross-over Centennial collectable that makes the my collection fun . Where to start automotive collectors, advertising collectors or topper collectors that's great the who are they is a little harder. Their got to be a list someone had to do that? So why not ask the "54 guys" for some help and after were done make a list available.
Happy Holidays Steve