Collectible coins, particularly in the context of the United States, encompass a variety of types, including patterns, which are test pieces created to gauge public opinion or propose new designs. The 1863 P-10 pattern coin is an example of such numismatic items; it was struck as a potential design for circulation coinage during the Civil War era. Patterns like the P-10 are highly sought after by collectors due to their rarity and historical significance, often featuring unique designs that differ from standard issued coins. These pieces typically carry premiums in the marketplace due to their limited production and artistic value.

Item Denomination Series Year Mint
1863 P$10 Gold J-349 P$10 Patterns 1863 Philadelphia