We are pleased to offer for sale this 1999-S Pennsylvania State Quarter Proof. Pennsylvania was admitted into the Union on December 12th of 1787. The reverse side of the Pennsylvania State Quarter features the statue, Commonwealth, with an outline of the state and their motto, Virture, Liberty, Independence, and a keystone. The reverse side of the Pennsylvania State Quarter was designed by John Mercanti. This 1999-S Pennsylvania State Quarter Proof is from the San Francisco (S) Mint. All State Quarters are comprised of .750 copper and .250 nickel with a weight of 5.67 grams and a diameter of 24.3mm. These Pennsylvania State Quarter Proofs come from original U.S. Mint Proof Sets. All of our State Quarter Proofs have nice eye appeal and no major marks or visible problems. This Pennsylvania State Quarter Proof represents a great value for the price. This 1999-S Pennsylvania State Quarter Proof Coin is worth the price for any collector or numismatist who wishes to fill a space in their collection. There were 3,713,359 of the 1999-S Pennsylvania State Quarter Proof Coins minted at the San Francisco Mint.