Coins, particularly collectible coins, encompass various types, including those produced as patterns or trial coins. In the United States, the fifty cents denomination, commonly referred to as a half dollar, has seen notable patterns and trial coins, such as those created in 1838 in Philadelphia. These trial pieces were experimental versions of designs that were not intended for general circulation, making them highly sought after by collectors due to their historical significance and limited availability.

Item Denomination Series Year Mint
United States of America 1838 Philadelphia Patterns & Trial Coins 50¢ 50¢ (Fifty Cents) Patterns & Trial Coins 1838 Philadelphia