Collectible coins are items of interest for numismatists and collectors, often valued for their historical significance, rarity, and condition. In the United States, a notable example is the Fifty Cents coin, also known as the half dollar, which has been produced in various designs since its inception. Counterstamped coins, particularly those from 1861, feature additional markings or designs applied after the original minting, adding uniqueness and value. The designation "N A" typically refers to coins that may not have a specific grading but are still categorized as collectibles.