Collectible coins, particularly from the United States, encompass a variety of types, including the iconic 1 cent (1c) coins. Proof sets, such as those from 2004, are special collections of coins that are struck with a high-quality process, resulting in a mirror-like finish and sharp details. These sets often include various denominations, showcasing the craftsmanship of the U.S. Mint and appealing to collectors due to their limited mintage and aesthetic quality.

Item Denomination Series Year Mint
2004-S 1c-$1 Proof Set 11 Coins 1c-$1 Proof Sets 2004 San Francisco