From 1965 to 1967, the US Mint did not produce Proof issues of the Kennedy Half Dollar series. Instead, Special Mint Sets were struck which have similarities to both Circulation and Proof issues. Similar to Proof examples, Special Mint Set coins were struck using polished dies. Unlike Proof examples these coins were not struck multiple times or individually handled, making high grade examples difficult to acquire. This set of 3 SMS Kennedy Half Dollars includes each year of issue graded in Mint State 67 condition. To add to the rarity of these stunning coins, they have been housed in Rick Tomaska's exclusive Signature series holder. These renowned holders are only given to Kennedy Half Dollars that Rick Tomaska has inspected and deemed to exhibit the highest quality luster and eye appeal for their date and grade. Each of these 3 SMS Kennedy Half Dollars have populations under 1% of their respective mintages, and Tomaska Signature Series populations under 100 examples! With such low populations, every single coin in this set is considered a Condition Rarity. To increase your numismatic knowledge, a signed copy of Rick Tomaska’s “Cameo and Brilliant Proof: Coinage of the 1950 to 1970 Era” book is included with this set.