This coin is a Seated Liberty Dollar from the United States, minted in 1850 at the Philadelphia mint. It is a proof coin, which means it was specially struck for collectors, resulting in higher quality and detail than standard circulation coins. The coin features a diameter of 38.1 mm and weighs 26.73 grams, composed entirely of silver, which was commonly used in U.S. coinage during that era. Notably, this specific example does not have a mintmark (indicated by 'P'), as it was produced at the main Philadelphia mint. As a denomination of $1 (One Dollar), this coin holds historical significance and represents a period when the Seated Liberty design was widely used. Its production has a reported mintage of zero, which may suggest it was struck in extremely limited quantities or possibly not released into circulation at all, making it a rare collectible. The coin is characterized by its classic design featuring Lady Liberty seated, holding a shield and a liberty pole, which is a striking representation of freedom and strength. Given its attributes and the historical context, this coin could hold significant value for collectors and numismatists alike.