Collectible coins, such as the 2011 United States One Dollar coins, are produced for numismatic purposes and often feature special finishes, such as proof quality. Proof sets, which include coins that are struck multiple times to enhance their detail and finish, were issued by the U.S. Mint and often include coins from various denominations. The 2011 proof set specifically contains coins minted that year, reflecting unique designs and commemorative themes. Collectors value these items for their artistry, rarity, and potential appreciation in value over time.

Item Denomination Series Year Mint
2011-S $1 Presidential Proof Set 4 Coins $1 (One Dollar) Proof Sets 2011 San Francisco