You have an Eisenhower (Ike) Dollar from the United States, minted in 1971 at the San Francisco Mint, which is denoted by the 'S' mint mark. This particular coin represents a $1 denomination, and it is made of silver, weighing approximately 24.59 grams and having a diameter of 38.1 millimeters. With a total mintage of 6,868,530 pieces, this coin is part of the series that honors former President Dwight D. Eisenhower and features his portrait on the obverse side, while the reverse side showcases a representation of the Apollo 11 mission insignia, symbolizing the United States' achievements in space exploration. Given its specifications, this coin is categorized as a mint strike, which means it was produced for circulation and has not been intended for the collector's market specifically, although many enthusiasts do seek them out. The combination of its silver content and its historical significance contributes to its value among collectors. Overall, this 1971 Eisenhower Dollar from the San Francisco Mint is not only a part of American monetary history but also a piece that may hold sentimental value for those interested in the legacy of Eisenhower and the advancements of his era.