The 2017-P Lincoln cent became the first-ever United States one-cent coin to bear Philadelphia’s “P” mintmark.
The coin, which has already been discovered in circulation and will also be included in this year’s uncirculated set, is a one-year type coin. In 2018, Philadelphia-minted one-cent coins will again be struck without a “P” mintmark – a tradition that has been maintained since the first official Federal one-cent coins were produced in 1793.
According to Tom Jurkowsky, director of the United States Mint’s Office of Corporate Communications, the 2017-P Lincoln cent was minted in recognition of the Mint’s 225th anniversary on April 2. The addition of the “P” mintmark was an idea suggested by employees of the Philadelphia Mint. The coin was intentionally released without fanfare to gauge how long it would take before the public questioned the Mint about the authenticity of the novel 2017-P pennies.