Collectible coins encompass a wide range of numismatic items valued for their rarity, historical significance, and aesthetic appeal. The United States, particularly known for its diverse coinage, features notable examples, such as the 1876 ten-cent coin (DT10c) produced at the Carson City Mint. Patterns refer to experimental or prototype coins created to test new designs or compositions before mass production. Collectors highly value these patterns, especially those from significant mints like Carson City, due to their limited availability and unique designs.