Collectible coins encompass a wide range of types, including patterns, which are experimental or trial pieces minted to test designs, compositions, or processes. The 1868 PH10c pattern is a notable example from the United States Mint in Philadelphia, showcasing a design that was not officially released for circulation. These patterns are often sought after by collectors due to their rarity and historical significance within numismatics.

Item Denomination Series Year Mint
1868 PH10c Copper J-637 BN PH10c Patterns 1868 Philadelphia