The Kennedy Half Dollar is a 50-cent coin issued by the United States Mint, first produced in 1964 to honor President John F. Kennedy following his assassination. The coin features a profile of Kennedy on the obverse and the presidential seal on the reverse. In 2018, specific production runs and mintmark varieties can influence collectibility, with coins in higher grades or limited quantities often commanding premium prices among collectors. The "N A" designation is not standard in numismatic terms but may refer to notes on a specific grading or attribution system.