Collectible coins include various types of numismatic items, such as historical currency, commemorative coins, and mint error pieces. The United States quarter, specifically the Washington quarter, was first minted in 1932 to commemorate the 200th anniversary of George Washington's birth. The 1951 San Francisco quarter is part of the series minted at the San Francisco mint, known for its lower mintage figures and higher demand among collectors, which can enhance its value. Coins from this era may feature specific markings such as the "S" mintmark, indicating their production location.

Item Denomination Series Year Mint
1951-S (San Francisco) Washington Quarters 25¢ (Twenty Five Cents, Quarter) Washington Quarters 1951 San Francisco