This description pertains to a 2021 American Innovation Dollar, a notable coin in the United States currency series. Denominating at one dollar ($1), this coin is part of the Proof production type, which indicates it has been struck with a higher quality for collectors, featuring a shiny and mirror-like finish. The coin showcases a diameter of 26.49 mm and is made from a unique alloy consisting of 88.5% copper, 6% zinc, 3.5% manganese, and 2% nickel. It lacks a defined mint mark and has a reported mintage of zero, suggesting it may be a unique or artistically significant piece within the series. This particular coin does not have clearly defined dimensions in terms of weight or width, but its edge type is listed as not applicable. This American Innovation Dollar is part of a broader initiative to honor American innovators and innovations, capturing the spirit of progress and creativity within the United States. Overall, this coin embodies the aesthetic and historical significance associated with the American Innovation series, making it a valuable item for collectors and numismatists alike. Its production year of 2021 indicates a relatively recent addition to American currency, contributing to its contemporary relevance in numismatic collections.