Collectible coins can include various types such as patterns, which are experimental coins struck to test designs or compositions prior to mass production. One notable example is the 1865 pattern coins from the United States, which were created during a period of design experimentation, particularly amidst the ongoing Civil War. These patterns are often highly sought after by collectors due to their rarity and unique historical significance within American numismatics. Generally, they feature distinctive designs that differ from regular issue coins and can represent a significant aspect of U.S. coinage history.

Item Denomination Series Year Mint
1865 P1c Copper J-403 BN P1c Patterns 1865 Philadelphia
1865 P1c Nickel J-406 P1c Patterns 1865 Philadelphia