Collectible coins, also known as numismatic coins, encompass a wide range of categories, including historical, commemorative, and rare pieces. In the United States, collectible coins can include those minted in specific years, like 1860, and often feature notable figures or events. The G 2 1 2 designation may refer to a specific grading scale or classification for a particular coin. Collectors often seek out coins associated with significant historical contexts, such as those related to prominent individuals like William Clark, an explorer known for his role in the Lewis and Clark Expedition. The value of collectible coins is influenced by their rarity, condition, historical significance, and demand among collectors.