This coin is a 1961 Washington Quarter, produced in the Philadelphia Mint and bearing the mint mark 'P'. It is part of the Washington Quarters series, which is a popular series of coins in the United States. The quarter has a diameter of 24.3 mm and weighs 6.25 grams, made of silver, which adds to its appeal among collectors. As a proof coin, it features a high-quality finish with a mirror-like surface and intricate details, which were achieved through a specialized minting process. The 1961 proof quarter has a mintage of 3,028,244 pieces, making it relatively available, but its silver content and proof quality may enhance its desirability among numismatists. The quarter has a denomination of 25 cents (25¢), and being part of the USD currency, it reflects a piece of American history and coinage. Overall, this coin represents a fine example of mid-20th century U.S. minting, celebrated for its aesthetic qualities and the legacy of George Washington, whose profile adorns the obverse.