2015-S Silver Early Releases. From 14 Coin PROOF SILVER SET Kennedy Half Dollar PF 70 Ultra Cameo NGC 50c. Perfect Coin & Holder. The item “2015-S Silver E. R. 14 Coin PR SET Kennedy 50C PF70 Ultra Cameo NGC” is in sale since Wednesday, August 29, 2018. This item is in the category “Coins & Paper Money\Coins\ US\Half Dollars\Kennedy (1964-Now)”. The seller is “fameautographs” and is located in Puyallup, Washington. This item can be shipped to United States, China, Japan.