The coin in question is a 2018 Sacagawea Dollar produced by the United States Mint in Philadelphia. This particular piece belongs to the series known as the Sacagawea Dollars, which features the image of Sacagawea, a Native American woman who played a vital role in the exploration of the American West. This coin is a proof variant, which means it was struck with a special process that gives it a high level of detail and a shiny, mirror-like finish—ideal for collectors and often cherished for its aesthetic qualities. Notably, the coin carries the "P" mint mark, indicating its origin from the Philadelphia Mint. Despite being a dollar coin, the quantitative details such as width, height, diameter, and weight are not specified, but proof coins generally follow standard specifications for size and weight. The mintage figure indicates that there may be no recorded production for this specific coin, which could suggest a limited release or an oversight in record-keeping. Overall, collectors may find this coin particularly appealing due to its proof status and connection to a significant historical figure, making it a potential highlight in a coin collection.