The 1999-S US Mint Proof Set 9 Coin Set in Original Government Packaging (OGP) is a highly sought-after collection of coins struck in proof condition at the San Francisco Mint. This set includes coins of denominations 1 cent, 5 cents, 10 cents, 25 cents, and 50 cents, all composed of copper. Certified by the U.S. Mint, this set is a perfect addition for any coin collector looking for pristine pieces from the United States.