Collectible coins, particularly pattern coins, refer to experimental or trial pieces created to test new designs or manufacturing techniques before full-scale production. In the context of the United States, the 1861 pattern coins were struck during a time of significant transition, showcasing innovative designs that did not go into regular circulation. These coins are highly sought after by collectors due to their historical significance and rarity, representing unique aspects of U.S. coinage from that era.

Item Denomination Series Year Mint
1861 P$2 1/2 Copper J-282 BN P$2 1/2 Patterns 1861 Philadelphia