The coin in question is a 1921 Standing Liberty Quarter, minted in Philadelphia (designated by the "P" mint mark). This quarter, which has a denomination of 25 cents, is part of the iconic Standing Liberty series that features a stunning design emblematic of early 20th-century American coinage. Crafted from silver, it weighs approximately 6.25 grams and boasts a diameter of 24.3 millimeters. The mintage for this specific year and type was about 1,916,000 coins, making it a relatively common issue compared to other dates in the series; however, its popularity and artistic design continue to appeal to collectors. The obverse of the coin displays the image of Liberty standing, holding a shield and an olive branch, while the reverse features an eagle in flight. Overall, this coin represents a significant piece of American numismatic history and is sought after for its historical value, artistic design, and silver content. Depending on its condition, the 1921 Standing Liberty Quarter can have a variable market value, which may range from several dollars in lower grades to hundreds of dollars in higher grades.
