Jaime Hernandez: The 2010-S Silver Proof Kennedy Half Dollar was only issued in the 2010 Silver Proof Set.
2010 Silver Proof Set- The 2010 Silver Proof Set went on sale on the U.S. mint web site on August 26, 2010. Each set had an example of each circulating coin but in a proof format and had a total of 14 coins in the set. The Roosevelt Dime, the 5 different America the Beautiful Quarters and the Kennedy Halves were composed of 90% silver. All other coins in the set were composed of the same metal composition as before.
Issue Price: The 2010 Silver Proof Set had a price of 56.95 each if purchased directly from the U.S. Mint.