Collectible coins, such as the United States quarter, come in various categories, including patterns and trial coins. The 1815 patterns are notable examples in numismatics, as they were experimental designs created before official minting decisions. These trial coins were produced to test designs, metals, and production processes, making them rare and sought after by collectors. Patterns often feature unique designs that differ from standard circulating coinage, enhancing their value and significance in the coin-collecting community.

Item Denomination Series Year Mint
United States of America 1815 N/A Patterns & Trial Coins 25¢ 25¢ (Twenty Five Cents, Quarter) Patterns & Trial Coins 1815 N/A