Collectible coins in the United States include various denominations such as the 1 cent (penny) and 50 cent (half dollar). Proof sets, which are specially packaged collections of coins struck with a high-quality finish, often attract collectors for their detail and rarity. The 1990 Proof Set, featuring coins from that year, typically includes a penny, nickel, dime, quarter, half dollar, and possibly commemorative issues, and is sought after for its condition and limited production.

Item Denomination Series Year Mint
1990-S 1c-50c Proof Set 1c-50c Proof Sets 1990 San Francisco