A commemorative coin is a coin issued to commemorate some particular event or issue with a distinct design with reference to the occasion on which they were issued. Many coins of this category serve as collector's items only, although some countries also issue commemorative coins for regular circulation.
The US Bicentennial quarter is an example of a circulating commemorative coin. It is one of the most common commemorative coins, with over 1.6 billion minted, and as a result is still in regular circulation.
Coin issued during the reign of Roman emperor Lucius Verus (161–169) to celebrate his victory against Vologases IV of Parthia. The reverse shows the mourning personification of Armenia.
Denmark two kroner coin issued in 1912 commemorating the accession in that year of king Christian X. The king’s late father, Frederik VIII is depicted on the reverse.
Soviet rouble of 1965, commemorating the 20th anniversary of the victory in World War II. 60 million pieces were minted and circulated as regular currency.
United States Bicentennial coinage
The United States Bicentennial coinage is a set of circulating commemorative coins, consisting of a quarter, half dollar and dollar struck by the United States Mint in 1975 and 1976. Regardless of when struck, each coin bears the double date 1776–1976 on the normal obverses for the Washington quarter, Kennedy half dollar and Eisenhower dollar. No coins dated 1975 of any of the three denominations were minted.
The Eisenhower dollar, with the double date 1776–1976
Half dollar Bicentennial reverse
Dollar Bicentennial reverse (Type I)
Dollar Bicentennial reverse (Type II)
