Collectible coins include various types, such as patterns, which are experimental designs created for approval prior to mass production. One notable example is the 1875 pattern coins from the United States, which were minted in limited quantities to test new designs. These patterns often showcase artistic innovations and provide insight into historical numismatic practices. Collectors highly value them due to their rarity and significance in the evolution of U.S. coinage.

Item Denomination Series Year Mint
1875 PG$1 Copper J-1432 BN PG$1 Patterns 1875 Philadelphia