Collectible coins, particularly in the context of the United States, encompass various types and series that are valued for their historical significance and rarity. The 25-cent quarter, commonly referred to as the Washington Quarter, has been a significant part of U.S. coinage since its introduction in 1932. The 1948 Washington Quarter, minted in San Francisco, is part of the series that features the iconic image of George Washington on the obverse and an eagle on the reverse. Coins from this era, especially those with San Francisco mintmarks, are often sought after by collectors due to their limited mintage and unique characteristics.

Item Denomination Series Year Mint
1948-S (San Francisco) Washington Quarters 25¢ (Twenty Five Cents, Quarter) Washington Quarters 1948 San Francisco