Collectible coins, particularly in the context of the United States, refer to various denominations and series that are sought after by numismatists. The 25-cent coin, commonly known as the quarter, features George Washington and has been minted in various designs since its inception. Washington Quarters, minted starting in 1932, have become iconic, especially the series from 1948, which marks the return of the design after World War II. The Denver mint released several notable varieties of these quarters, which are distinguished by their "D" mintmark, indicating their place of production. Collectors often seek specific years, mintmarks, and conditions that contribute to the coin's rarity and value.

Item Denomination Series Year Mint
1948-D (Denver) Washington Quarters 25¢ (Twenty Five Cents, Quarter) Washington Quarters 1948 Denver