2014 S US Mint Silver Proof Set (SW1). 2014-S US Mint Silver Proof Set (SW1). Includes Original Government Packaging & Certificate of Authenticity. The 2014-S United States Mint Silver Proof Set contains 14 coins in stunning proof quality displayed in three protective lenses. Each of these 2014-dated coins bears the “S” mint mark of the United States Mint at San Francisco. The quarters, half dollar and dime are struck in 90% silver, generally referred to as coin silver. Harding, Calvin Coolidge, Herbert Hoover, and Franklin D. 5 x 3.5 x 2.5 inches. Silver, Nickel, Copper, Zinc. 1 month and up. We reserve the right to cancel any order for any reason at any time. We are not responsible for undeliverable addresses. Your feedback very important to us, after you get your package and you are. Satisfied with our service. If you have any problem with your order / any questions please before leave any type of feedback. Thank you for shopping at our store.