coins \ Coin \ United States of America \ \ Patterns \ 1869 \ Philadelphia
Collectible coins encompass a wide range of types, including patterns, which are trial pieces struck to test designs or minting techniques before official production. An example includes the 1869 Patterns minted in Philadelphia, notable for their unique designs not adopted for circulation. These pieces are highly sought after by collectors due to their rarity and historical significance within U.S. numismatics.