Collectible coins in the United States encompass various types, including proof sets, which are specially minted coins characterized by their high-quality finish and clarity. The 2005 Proof Set includes coins from that year, struck with a mirror-like finish, and is highly sought after by numismatists. The set typically contains one of each denomination, from the 1-cent coin (Lincoln penny) to the half dollar, showcasing the artistry and craftsmanship of the minting process. Collectors often value these sets for their aesthetic appeal and historical significance.

Item Denomination Series Year Mint
2005-S 1c-$1 Proof Set 11 Coins 1c-$1 Proof Sets 2005 San Francisco