Collectible coins can be categorized into various types, including patterns, which are trial pieces made to test designs prior to mass production. The 1864 P10c pattern coin, specifically relating to United States coinage, is an example of this type. These patterns are notable for their artistic designs and historical significance, often produced in limited quantities, making them highly sought after by collectors. The numismatic value of such items can be substantial, influenced by their rarity, condition, and historical context.