1999 S US Mint Silver Proof Set w/ State Quarters US Mint Box & COA. Box has wear being opened and closed numerous times. Set inside in near perfect condition. Coins are magnificent with no toning or tarnish. Cases are clear with minimal scratching. This is a key date in the series being the first year of 50 state quarters The beauty and craftsmanship and detail of these proof coins is an absolute delight for the collector and the quality of the minting along with sovereign government backing original packaging and certificate of authenticity guarantee purity and weight for the serious stacker.