Collectible coins, particularly in the United States, encompass a wide range of types, including patterns, which are trial strikes intended to evaluate design and composition before a coin is officially minted. The "P" mint mark indicates that a coin was produced at the Philadelphia Mint. The 1857 patterns are especially notable as they were part of a series that attempted to modernize American coinage, incorporating new designs and metals. These collectible patterns are highly sought after by numismatists due to their rarity and historical significance in the evolution of U.S. currency.
| Item | Denomination | Series | Year | Mint | |
|---|---|---|---|---|---|
|
(1857) P$20 Copper, Uniface Die Trial J-190 BN | P$20 | Patterns | 1857 | Philadelphia |