The coin in question is a 2018 Sacagawea Dollar, issued by the United States Mint in Philadelphia. This coin features the image of Sacagawea, a pivotal figure in American history known for her role as a guide and interpreter for the Lewis and Clark Expedition. It is a one-dollar denomination coin, falling under the sub-type of coins in the USD currency series. This particular piece, bearing the 'P' mint mark, indicates that it was produced at the Philadelphia Mint. Notably, the coin has a reported mintage of 0, which suggests that it may be either a special issue, an error, or not released into circulation. The Sacagawea Dollar is made of manganese-brass, giving it a distinctive golden hue. While specific weight, diameter, and height measurements are not provided, standard Sacagawea Dollars typically have a diameter of 26.5 mm and weigh 8.1 grams. As a relatively modern coin, it is part of the ongoing effort to honor notable figures in American history. The 2018 Sacagawea Dollar could be of interest to collectors, especially if it was part of a special release or commemorative set. Depending on its condition, rarity, and demand within the collectors' market, this coin could have a value that exceeds its face value of one dollar.