Collectible coins encompass a wide range of categories, including historical, commemorative, and error coins. In the United States, notable types include coins minted in Philadelphia, such as the 1839 Trial Coins, which were produced to test new designs or manufacturing techniques before full-scale production. These coins often feature unique patterns and variations, making them highly sought after by collectors for their rarity and historical significance. Other varied patterns may include design changes or experimental coins that provide insight into the evolution of U.S. coinage.

Item Denomination Series Year Mint
1839-P (Philadelphia) Patterns & Trial Coins Other / Varied Patterns & Trial Coins 1839 Philadelphia