Standing Liberty Quarters are a series of 25-cent coins minted by the United States from 1916 to 1930. The coin features a design by Hermon A. MacNeil, showcasing Liberty standing in a classical pose, which is framed by a depiction of an eagle on the reverse. The 1921 Standing Liberty Quarter, minted in Philadelphia, is particularly notable as it represents a transitional phase in the series, with variations in the design and production quality contributing to its collectibility. Collectors often seek out this year due to its historical significance and relative rarity compared to other years in the series.

Item Denomination Series Year Mint
1921-P (Philadelphia) Standing Liberty Quarters 25¢ (Twenty Five Cents, Quarter) Standing Liberty Quarters 1921 Philadelphia