1964 Kennedy Half Dollar Coin
Tricks from # 1 thru # 24
The 1964 Kennedy half dollar was the last year they made silver half dollars.  A few pieces dated 1971D and 1977D were struck in silver clad by mistake. From 1965 to 1970 the Kennedy half dollar became a clad coin with the outer layers made of .800 silver, .200 copper bonded to an inner core of .210 silver and .790 copper. 

Peace Silver Dollar Coin Description
Tricks from # 25 thru # 33
    The Peace Dollar was minted to commemorate the signing of the peace treaty between the United States and Germany after World War I. Interestingly, this silver coin was created without a new Congressional Act; instead it was minted under the provisions of the Pittman Act that authorized the reissue of the Morgan Silver Dollar in 1921.
  
                 http://www.goldline.com/coins/product/morgan-silver-dollar.htmlshapeimage_2_link_0