In the realm of collectible coins, patterns refer to experimental or prototype coin designs that were created to test new concepts or designs before mass production. In the United States, patterns are particularly significant among collectors due to their rarity and historical value. The 1851 P1c pattern is an example, representing an early instance of coinage testing during a period of significant numismatic development in the U.S. These coins are often highly sought after for their unique characteristics and limited mintage.

Item Denomination Series Year Mint
(1851) P1c Original J-127 P1c Patterns 1851 Philadelphia
(1851) P1c Silver J-128b P1c Patterns 1851 Philadelphia