Collectible coins are often categorized based on their rarity, condition, and historical significance. In the United States, coins such as the 1 cent (penny) and 50 cent (half dollar) pieces are popular among collectors, particularly when they are part of Proof Sets. The 1984 United States Proof Set, minted in San Francisco, includes high-quality versions of coins struck with a polished finish, making them desirable for collectors. These sets often feature labeling that indicates their status as "proof," enhancing their value and market appeal.

Item Denomination Series Year Mint
1984-S 1c-50c Proof Set 1c-50c Proof Sets 1984 San Francisco