The coin in question is a notable example from the Patterns & Trial Coins series of the United States, minted in the year 1861. This piece is categorized as a 50-cent denomination coin, commonly known as a half dollar. As a trial piece, it was struck using a Proof production process, which typically results in a coin with a highly polished finish and pronounced details, making it particularly sought after by collectors. However, it is important to note that this coin does not have a mint mark, indicating that its specific place of production is unrecorded or not applicable. Notably, this coin has a reported mintage of zero, which characterizes it as a rare item, as there were no coins officially produced for circulation in this category. Additionally, its physical dimensions such as diameter, width, height, and weight are recorded as zero, which might indicate that the specific measurements have not been recorded or are not applicable for this unique piece. The material used for this coin is classified simply as "Other," which suggests that it may not fall into the standard categories utilized for coins that are typically made from silver, copper, or other known coinage metals. Overall, this 1861 trial coin stands out due to its rarity and the unique circumstances of its production. It embodies a significant moment in numismatic history, making it highly valuable and collectible for enthusiasts of American coinage.