The jockey at the bottom has the 'z' cut off his last name.
Based on the baseball players, it looks like it's related to this game:
Quote:
Oct. 12, 1958: Blair hosts professionals for the first time as a team of Long Beach-based stars met a team of major leaguers in a home run hitting contest, won by former Jordan standout and Dodgers rookie Ron Fairly, and a game that ended in a 4-4 tie.
Bob Lemon managed and Stevens served as coach of the Long Beach team that included Joe Amalfitano, Lou Berberet, Rocky Bridges, Bud Daley, Fairly, Joe Duhem, Jack Graham, Harry Minor and Bill Wilson.
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https://www.dailynews.com/2008/04/09...looked-better/
So I would date it to late 1958 if the package doesn't have a date. Neat find.