This coin is a 1968 Lincoln Cent featuring a Memorial Reverse, minted in Denver, indicated by the 'D' mint mark. It is a part of the United States currency system, specifically classified under coins, with a denomination of one cent (1¢), often referred to as a penny. Measuring 19 mm in diameter and weighing 3.11 grams, this coin is composed of brass. It was produced as a mint strike, which refers to coins that are struck by a minting press, resulting in high-quality finishes. The year of mintage, 1968, is significant, and with a total production of approximately 2.886 billion pieces, it is relatively common. The Lincoln Cent is a notable series in American numismatics, honoring President Abraham Lincoln, and the Memorial Reverse design symbolizes the dedication of the Lincoln Memorial in Washington, D.C. This particular coin, with its extensive mintage, is typically valued at face value, although certain conditions and collector interest may influence its market worth. In summary, this coin represents a piece of American history and currency, reflecting both the ongoing significance of the Lincoln legacy and the era in which it was minted.