In 2009, the United States Mint issued a variety of collectible coins, including Proof Sets that showcased high-quality, mirror-like finishes. The Proof Set for that year included coins from various denominations, exemplifying exquisite minting techniques. Specifically, the 1-cent coin (1c) in the set featured distinct design elements, representing the Lincoln penny with advancements in minting technology. Collectors value these sets for their aesthetic appeal and limited mintage, making them sought-after items in numismatic circles.

Item Denomination Series Year Mint
2009-S 1c-$1 Proof Set 18 Coins 1c-$1 Proof Sets 2009 San Francisco