Collectible coins, particularly from the United States, can vary widely in type and value. The 2011 San Francisco Mint produced a notable series of half dollars, typically referred to as 50-cent coins. These coins may come in rolls, which often contain 20 units. Various characteristics, such as mint marks, condition, and rarity, contribute to their collectibility and market value.

Item Denomination Series Year Mint
2011-S 50c Roll 20 Coins Clad 50c Roll Half Dollars 2011 San Francisco