The Philadelphia Mint came into being through the Coinage Act of 1792. As the nation's first mint, and for 46 years only, no mint mark was used. Not until 1942 did the "P" mark come to designate the Philadelphia Mint.

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The Philadelphia Mint came into being through the Coinage Act of 1792. As the nation's first mint, and for 46 years only, no mint mark was used. Not until 1942 did the "P" mark come to designate the Philadelphia Mint.

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