This coin is a 2010 Proof Roosevelt Dime, minted in San Francisco, which is identified by its "S" mint mark. The Roosevelt Dime is a ten-cent coin that honors President Franklin D. Roosevelt and is made from a copper-nickel clad composition. With a diameter of 17.9 mm and weighing 2.27 grams, it is a standard size for a dime. The 2010 coin is part of a series that has been produced since 1946 and is a favorite among collectors, especially in its Proof version. Proof coins are specially made with higher quality and detail, featuring a polished finish that enhances their aesthetic appeal. The mintage for this particular coin is 1,130,815, which contributes to its collectibility. Its value is primarily determined by its collectible nature rather than its face value of 10 cents. As an example of modern U.S. coinage, this Roosevelt Dime represents a piece of numismatic history that continues to be popular among coin enthusiasts and collectors. Whether it's for completion of a series, investment, or historical appreciation, this coin encapsulates a significant part of American monetary legacy.