Collectible coins encompass a variety of categories, including numismatic coins, commemorative coins, and bullion coins. In the United States, fifty-cent coins (often referred to as half dollars) have a rich history, with notable issues like the 1861 Seated Liberty half dollar, which showcases classic design elements and historical significance. Counterstamped coins, including those from the 1861 era, feature an added design or mark, often made for promotional purposes or to indicate value, enhancing their collectibility and unique appeal among numismatists.