S Mint Limited Edition Silver Proof Set OGP COA SKU:CPC8068. This official eight-coin 2012 Limited Edition Silver Proof Set from the U. Mint includes a Kennedy half dollar, Roosevelt dime, and all five America the Beautiful quarters, all struck at the San Francisco Mint in 90% silver with a proof finish. The set also includes a 1 oz American Silver Eagle proof coin struck at the West Point Mint in 99.9% silver. The coins are housed in a plastic display case and include original government packaging and certificate of authenticity. All coins have various degrees of toning and are not set evenly in the cardboard holder. The images you see are for the exact item you will receive. Mint Limited Edition Silver Proof Set.