The coin in question is a proposed national issue from the year 1787, representing a denomination of 1/2 P (or half a penny) in the currency of the United States of America (USD). Although it bears the distinctive title of a national proposal, it was not formally minted, as indicated by the absence of a mint and mintage recorded as zero. This particular piece is categorized under the series "Proposed National Issues," which typically includes coins that were designed but not officially produced for circulation. It falls into the broader subclass of "Coins" and is described as having undergone a "Mint Strike" production type, suggesting that it was at least designed with the intent for eventual minting. As for its physical attributes, the coin possesses no recorded dimensions for width, height, or diameter, nor any specified weight. Consequently, these details remain unknown. Furthermore, it lacks information regarding the edge type, designer, and mint mark, reinforcing its status as an unissued piece. The material composition is classified as "Other," indicating that it may not conform to standard coin materials like copper or silver, which is common in many historical contexts. Its currency amount is noted at $0.005, correlating to its denomination. Overall, this proposed coin serves as an interesting artifact of American numismatic history, illustrating the complexities and aspirations of early U.S. coinage design, even in instances where the pieces never made it into official circulation.