Collectible coins encompass a variety of types, including patterns, which are trial designs created to test features before official minting. In the United States, one notable example is the 1875 patterns, specifically the 20 cent (P20c) coin, which was designed but never widely produced for circulation. These coins are highly sought after by collectors due to their rarity and historical significance, often representing key moments in numismatic history. The 1875 P20c pattern provides insight into the minting process and the evolving monetary system of the era.

Item Denomination Series Year Mint
1875 P20c Silver J-1392 P20c Patterns 1875 Philadelphia