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A quick google search turned up this.
http://www.gettyimages.com/detail/3227577/Hulton-Archive
It looks like it is from 1945.
In 1923, when Yankee Stadium opened, the grandstand ticket price was $1.10. It was $1.25 in 1945. I don't know when it went up to $1.45, but a grandstand stub at $1.10 could be as early as 1923 until the increase, which would have been no later than 1945, and probably earlier.