The coin in question is a 1921 Morgan Dollar, a classic piece of American numismatic history. Struck by the United States Mint in Philadelphia, this coin features a diameter of 38.1 mm and a weight of 26.73 grams, consistent with the standard specifications for Morgan Dollars. This particular issue is notable as it was the final year of the Morgan Dollar series, which had been first introduced in 1878. Made of 90% silver, this dollar coin still retains a significant silver content, making it appealing to both collectors and investors alike. The 1921 Morgan Dollar has a mintage of 44,690,000, which places it among the more widely available coins in the series. Its design showcases the iconic profile of Lady Liberty on the obverse, while the reverse features a majestic eagle with its wings spread, holding a branch and arrows. Being a mint-state or uncirculated piece, this coin would exhibit a brilliant luster and sharp details, characteristic of mint strike coins. The Morgan Dollar is beloved for its historical significance and artistry, making the 1921 Philadelphia issue a substantial addition to any coin collection.