US$ Innovation Pennsylvania 2019 "D"
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• Second issue from the series of dollar coins in honor of American inventors and inventions: the American Innovation $ 1 Coins. Four issues will appear per year.
• The coin is devoted to the development of the polio vaccine by a team at the University of Pittsburg.
• The coin was minted by the Denver Mint, mint mark D.
• The coin is devoted to the development of the polio vaccine by a team at the University of Pittsburg.
• The coin was minted by the Denver Mint, mint mark D.