The 2005-S United States Mint Proof Set is a highly sought-after collection of 10 uncirculated coins, each struck with a proof finish. This set includes coins with a denomination of $1, composed of 90% copper, and minted in San Francisco by the U.S. Mint. The set comes complete with a Certificate of Authenticity and Original Government Packaging, making it a valuable addition to any coin enthusiast's collection.