Collectible coins, including those from the United States, often feature various types such as Proof Sets, which are specially minted coins with a high-quality finish. The 2017 Proof Set from San Francisco includes coins produced with a polished die, resulting in a mirror-like surface and sharp details. The set typically contains 14 coins, including the 1-cent coin (1c) and other denominations, all showcasing the iconic designs particular to that year. These sets are popular among collectors for their aesthetic appeal and limited mintage.

Item Denomination Series Year Mint
2017-S 1c-$1 Proof Set 10 Coins 1c-$1 Proof Sets 2017 San Francisco