Collectible coins encompass various categories, including patterns, which are experimental or trial pieces struck to test designs and processes. One notable example is the 1873 Philadelphia Mint pattern coins, which were produced as potential designs for future circulation. The designation "P" refers to the Philadelphia Mint, while "2 50" likely indicates a denomination, such as $2.50, commonly associated with coins like the Quarter Eagle. These patterns often attract numismatic interest due to their rarity and historical significance in American coinage.

Item Denomination Series Year Mint
1873 P$2.50 Copper J-1333 RB P$2.50 Patterns 1873 Philadelphia