The 2013-S US Mint Limited Edition Silver Proof Set includes 8 coins in a box with a Certificate of Authenticity (COA) from the U. The coins are uncirculated, made of silver with a fineness of 0.999, and struck in proof quality. The set originates from the United States and includes coins with various denominations, with the majority being 25 cents. This limited edition set is a collector’s item showcasing a range of coins from the San Francisco Mint.