The 2012 Silver Proof Set Limited Edition is a collection of coins released by the United States Mint. The set includes 14 coins, each struck in a special proof finish and made of 90% silver: One-dollar coin – features a design of Chester A. Arthur, the 21st President of the United States. Half-dollar coin – features a design of the iconic Benjamin Franklin Liberty Bell. Quarter-dollar coins – feature designs representing the states of Puerto Rico, Guam, American Samoa, the U.S. Virgin Islands, and the Northern Mariana Islands. Dime – features a design of Franklin D. Roosevelt. Nickel – features a design of Thomas Jefferson. Penny – features a design of Abraham Lincoln. The coins are presented in a custom blue velvet case, along with a certificate of authenticity. The set has a limited mintage and is highly sought after by collectors due to the special proof finish and the silver content of each coin. The 2012 edition is especially sought after, as it was a limited edition of only 50,000 sets, making it rarer than other proof sets.