1957 United States Proof Coin Set in Original Government Packaging - This 1957 United States proof set contains proof versions of the Lincoln Cent and Jefferson Nickel struck in base metal, along with a Jefferson Dime, Washington Quarter, and Franklin Half Dollar each struck in 90% silver. These United States Mint proof sets are the key to securing the very best of the best when it comes to American silver coins. Throughout the 1950s and early 1960s, the U.S. Mint issued annual Silver Proof Sets which contained immaculate proof versions of the five U.S. coin denominations of the day, three of them struck in 90% pure silver. The era of U.S. 90% Silver Proof Sets ended in 1964, making these sets the last 90% Silver Proof Set to feature proof versions of actual circulating silver coins. Each coin in this set has been meticulously proof struck for razor-sharp details and deeply mirrored backgrounds. And don?t forget, this set features one of the last years of the Franklin Half Dollar before it was replaced by the Kennedy Half Dollar from 1964. The coins are sealed in the original mint pliofilm packaging in individual compartments, with foil seal imprinted with "US MINT PHILADELPHIA" in a sixth compartment. The set also includes the original envelope.