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fkwThe 2 scratched out "An Exhibit Card" cards are from 1955 from my notes.
Here is a link to my page of how to date the Exhibits
http://centuryoldcards.com/1930/1939-66ExhibitInfo.html
Most of the info is from an SCD article back in the 1990s
PS. There really are 3 Rizzuto variations, the one that is not pictured above will have the "An Exhibit Card" unscratched (1949)