Collectible coins often include patterns, which are trial pieces or prototypes created to test designs before mass production. One notable example is the 1874 pattern coins struck in Philadelphia, showcasing innovative designs that reflect the artistic and technological advancements of the era. In the context of U.S. coinage, "P" refers to the Philadelphia Mint, while "2 50" could denote specific denominations or catalog numbers associated with collectible pieces from that timeframe. These patterns can be highly prized by numismatists for their historical significance and rarity.

Item Denomination Series Year Mint
1874 P$2.50 Copper J-1367 BN P$2.50 Patterns 1874 Philadelphia