Collectible coins often encompass various types, including patterns, which are experimental pieces made to test designs before official minting. The 1871 Philadelphia patterns are significant examples from the United States, featuring unique designs that were never released as standard coinage. The ā€œPā€ mint mark indicates coins produced at the Philadelphia Mint, while the term "50" may refer to denominations or specific collections within the series. These patterns are sought after by collectors due to their historical value and limited availability.

Item Denomination Series Year Mint
1871 P$2.50 Copper J-1164 BN P$2.50 Patterns 1871 Philadelphia