The coin in question is a unique and significant piece from the Patterns & Trial Coins series, minted in Philadelphia in 1861. This 50-cent denomination coin, with a currency value of 0.50 USD, is part of a captivating chapter in American numismatic history. This particular coin exhibits some distinctive features that set it apart from others. It is categorized as a Proof coin, which denotes a method of production used to create coins that have a mirror-like finish, often intended for collectors rather than circulation. However, this coin does not carry a mint mark, indicating it was produced at the Philadelphia Mint, known for its iconic role in American coinage. Interestingly, the dimensions of the coin—width, height, and diameter—are listed as 0.00000000, which suggests that specific measurements might not be available or applicable for this particular trial coin. Likewise, the weight and edge type are also designated as 'N/A,' indicating that these attributes are not provided or relevant for this piece. The coin's material is classified simply as 'Other,' which might imply it was struck in a non-standard metal or alloy not typically associated with regular circulation coins. With a mintage figure of 0, it suggests that none were officially produced for public circulation, further enhancing its appeal to collectors and historians alike. As a product of its time, this 1861 half dollar serves as a fascinating artifact that reflects the experimental nature of coin design during the Civil War era. It embodies not only monetary value but also historical significance, making it an intriguing subject for numismatists and lovers of American history.