2012 Silver Proof Set U. Mint Original Government Packaging OGP COA. This official 2012 U. Mint 14 coin Silver Proof Set contains a Native American dollar, Kennedy half dollar, Roosevelt dime, Jefferson nickel and Lincoln cent, along with all five National Park quarters, and all four Presidential dollars. All coins bear the San Francisco “S” mint mark, and feature extra sharp images and mirror-like surfaces. The half dollar, quarters and dime are all 90% silver. Comes with the original U. Mint packaging, including a certificate of authenticity. These sets were made in 2012 and are not brand new. The packaging may show signs of wear such as minor folds and scrapes. The images used for this listing are stock photos from our inventory. Mint Silver Proof Set.