Collectible coins, also known as numismatic coins, are coins valued for their rarity, historical significance, or condition rather than their face value. The United States issued various collectible coins, including those from significant historical periods. One notable figure in American numismatics is John Chalmers, an engraver and coin designer who worked on pieces like the 1783 Continental Currency Coin, often referred to as the "6P" coin, representing its six pence value. These coins are sought after by collectors for their connection to early American history.