coins \ Coin \ United States of America \ \ Patterns \ 1839 \ Philadelphia
Collectible coins refer to numismatic items that are sought after by collectors for their historical significance, artistic design, rarity, and condition. One notable type of collectible coin is the Pattern coin, which is an experimental version of a coin that was produced to test new designs or methods before official minting. An example includes the 1839 Pattern coins minted in Philadelphia, which were created during a period of transition in U.S. coinage, reflecting changes in design and composition as the country sought to standardize its currency. These coins are prized for their uniqueness and connection to American minting history.