1992 through 2011 SILVER Proof Kennedy Set of 20. Silver Proof Kennedy Half Dollars. Get all 20 of the hard to find SILVER PROOF KENNEDY's at one time. This set contains all of the tough SILVER Proof Kennedy's including the low mintage issues from 1992 through 1998, the lowest mintage 2008 silver proof Kennedy and the just issued 2011. All Silver and Clad Proof Kennedy's available at.The item "1992 2011 90% SILVER Proof Kennedy Set of 20 1992 through 2011" is in sale since Monday, July 18, 2011. This item is in the category "Coins & Paper Money\Coins\ US\Half Dollars\Kennedy (1964-Now)". The seller is "timer6256" and is located in Prospect, Kentucky. This item can be shipped to United States.