1999 S 50 State Quarters Proof Set Brilliant Uncirculated Photos in this listing may or may not be stock photos. The photos are meant to be an indication of the product you will receive. Quarter sets like this one are an ideal way to complete a collection of the popular State Quarters series. Set Highlights: Minted by the U.S. Mint in San Francisco. Set comes in original mint packaging including a protective hard plastic case and an outer box.