This coin is a 2009 Sacagawea Dollar, produced at the San Francisco Mint, and designated as a proof coin. It represents a valuable piece of U.S. currency, with a denomination of one dollar (USD). The coin is made of manganese-brass, which gives it a unique luster and color. The obverse side displays the iconic portrait of Sacagawea, the Native American woman who played a crucial role in the Lewis and Clark Expedition. The reverse features a beautifully detailed depiction of a flying eagle, symbolizing freedom and strength. With a mintage of 2,179,867, this proof version is a collector's item, showcasing the superior quality often sought after by numismatists. The coin has a diameter of 26.5 millimeters and weighs approximately 8.07 grams. Despite having no specified width or height, it retains a substantial feel and presence. This particular proof Sacagawea Dollar stands out not only for its artistry but also for its limited production, making it a noteworthy piece for any coin enthusiast’s collection. Its combination of heritage, craftsmanship, and rarity contributes to its value in the marketplace.