The coin in question is a 1859 Seated Liberty Half Dime, minted in Philadelphia, featuring the "P" mint mark. This particular piece is of the Proof variety, which signifies that it was specially struck for collectors rather than general circulation. The coin's denomination is five cents, commonly referred to as a half dime. Crafted from silver, this coin weighs approximately 1.24 grams and measures 15.5 millimeters in diameter. With a mintage of only 800 pieces, it is a relatively rare find among collectors and numismatists. The Seated Liberty design is known for its elegant portrayal of Liberty seated, holding a pole topped with a liberty cap, which symbolizes freedom. The reverse typically features a shield and emblematic elements consistent with the series, reaffirming its identity as a quintessential representative of American coinage during the mid-19th century. Given its limited mintage and specific characteristics, this 1859 Seated Liberty Half Dime holds significant value in the numismatic market, particularly for those interested in collecting American silver coins or pieces from the Seated Liberty series. Its excellent condition, as implied by its proof status, would further enhance its desirability among collectors.