Patterns are experimental coins struck to test designs or compositions before official coinage. In the United States, one notable year for patterns is 1865, during which various designs were created, including those featuring the "P" mint mark, indicating production by the Philadelphia Mint. These coins are typically struck in small quantities and are highly sought after by collectors due to their rarity and historical significance. Collectible coins from this era often showcase innovative designs that reflect the artistic and economic context of the time.

Item Denomination Series Year Mint
1865 P$3 Copper J-441 BN P$3 Patterns 1865 Philadelphia