Collectible coins, specifically those from the United States, encompass various categories, including patterns. Patterns are experimental coin designs created to test new ideas or designs before final production, and they often hold significant historical and numismatic value. The 1877 P10c, a ten-cent pattern coin, exemplifies this type, featuring unique designs that may differ from standard issues. Collectors highly prize such coins for their rarity and the insight they provide into the U.S. Mint's design processes during that era.