The coin in question is an 1875 Seated Liberty Quarter, minted in Philadelphia with a "P" mint mark. This coin represents a significant piece of American numismatic history, as it is part of the Seated Liberty series, which was produced from 1838 to 1891. The quarter has a denomination of 25 cents (Twenty Five Cents) and is composed of silver, weighing in at 6.25 grams and measuring 24.3 mm in diameter. This particular piece was struck as a proof coin, indicating that it was produced for collectors and typically exhibits a higher level of detail and a polished finish compared to regular circulation strikes. The mintage for this year and type is notably low, with only 700 proofs produced, making it a rare item for collectors. The overall quality and preservation of the coin will greatly influence its grade and potential value. Given its unique features, historical significance, and limited mintage, the 1875 Seated Liberty Quarter is a sought-after item among numismatists and can command a premium price in the market.