The 1963 Washington Quarter minted in Philadelphia (denoted by the no mint  mark) is a silver coin with a composition of 90% silver and 10% copper. Here are some details about this coin:

• Mintage: A total of 77,391,645 1963 Washington Quarters were produced at the Philadelphia Mint.
• Diameter: The coin has a diameter of 24.3 mm.
• Weight: It weighs 6.25 grams.
• Design: The obverse (front) of the coin features a portrait of George Washington, while the reverse (back) depicts an eagle.