This coin is a 2016 Sacagawea Dollar with a San Francisco mint mark, indicating it was produced at the San Francisco Mint. It is part of the broader series of Sacagawea Dollars, which celebrate the contributions of the Native American woman Sacagawea. This particular piece is notable for being classified as a "Special" production type, which often refers to specific collector editions or proofs, setting it apart from typical circulation coins. The coin features a diameter of 26.5 millimeters and a weight of 8.07 grams, showcasing its standard physical characteristics consistent with Sacagawea Dollars. It is composed of manganese-brass, which gives it a distinctive golden color and resilience against wear. Despite the presence of a stated mintage figure of 0, this typically denotes that the coin is part of a limited or special edition that may not have been widely released, making it particularly appealing to collectors. The obverse side of the coin features a portrait of Sacagawea, while the reverse often contains imagery that reflects American heritage or themes relevant to Native American history. Overall, this 2016 San Francisco Mint Sacagawea Dollar is a valuable piece for collectors, especially those focusing on modern U.S. coinage, with its special production designation enhancing its desirability and potential value in the numismatic market.