Collectible coins include a variety of types, among which are counterstamped coins, which feature an additional mark or design added post-minting. The 1978 One Dollar coin, representing a specific year of issue for the United States, is a notable collectible item. In the realm of U.S. coins, certain years and mintmarks can elevate the value and interest among collectors. Counterstamped coins often reflect historical events or personal identifiers, adding uniqueness and appeal to the collecting community.