Collectible coins, particularly those from the United States, include various denominations and types, with the 1-cent coin (commonly known as the penny) being one of the most recognizable. Proof sets, such as the 2014 U.S. Mint Proof Set, are specially minted collections that showcase coins with a higher quality finish for collectors and investors. These sets typically include coins from different denominations, each struck with a polished die, resulting in a mirror-like surface. Collectors value proof sets for their artistry, rarity, and potential for appreciation in value over time.

Item Denomination Series Year Mint
2014-S 1c-$1 Proof Set 14 Coins 1c-$1 Proof Sets 2014 San Francisco