The coin in question is a Seated Liberty Dime, minted in 1866 at the Philadelphia Mint (indicated by the 'P' mint mark). As part of the Seated Liberty series, this dime features a design that showcases Lady Liberty seated on a rock, symbolizing freedom and strength. This specific coin is made of silver, weighing approximately 2.49 grams and having a diameter of 17.9 mm. While the width and height dimensions are not specified, the standard profile of a dime is consistent with these measurements. The denomination of this coin is 10 cents, or one dime, which is a popular and historically significant unit in the United States currency system. With a mintage of only 8,000 pieces, this 1866 Seated Liberty Dime stands out as a relatively rare collectible. The coin's production type is a mint strike, indicating it was produced directly from the coinage dies, and thus should exhibit the sharpness and detail expected from a freshly minted coin. Overall, this coin is not just a piece of currency but also a tangible representation of American history, cherished by numismatists and collectors alike for its artistry, rarity, and cultural significance.