The coin in question is a 1915 Indian Head Quarter Eagle, valued at $2.50, which is a denomination equivalent to two and a half dollars. This particular specimen was minted at the Philadelphia Mint, as indicated by its "P" mint mark. The coin features a beautiful design representative of the Indian Head series, known for its iconic depiction of a Native American chief on the obverse and an eagle on the reverse. Crafted from gold, this coin weighs approximately 4.18 grams and has a diameter of 18 millimeters. It is a proof coin, which means it was struck with special care to produce a high-quality finish, making it especially sought after by collectors. With a mintage of only 100 pieces, this 1915 Indian Head Quarter Eagle is quite rare, significantly adding to its collectible value. As a part of the United States currency history, it reflects both artistic merit and the craftsmanship of early 20th-century coinage. Collectors and numismatists often seek out items like this for their unique qualities and historical significance in American currency.