Collectible coins, particularly those from the United States, often include various types such as the 25 cent quarter. The Washington Quarter, first minted in 1932, features the portrait of George Washington and has seen numerous design variations over the years. The 1990 San Francisco Mint quarters are part of a series that includes both circulation strikes and proofs, with the latter being particularly sought after by collectors for their high-quality finish and limited mintage.

Item Denomination Series Year Mint
1990-S (San Francisco) Washington Quarters 25¢ (Twenty Five Cents, Quarter) Washington Quarters 1990 San Francisco