I wish I knew. I have a dozen of these coins... most with a 'D' above the year if that helps. ♥ I gave a bicentennial one to a friend of mine only to regret it a bit later when I found out how much it's worth online!
You'll almost certainly get a KENNEDY half dollar, as pictured, were you to be the winning bidder or one who exercises the GIN option This is not a forum for lawyers trying to make someone agree to deliver something unintended and which is clearly misstated due to their lack of familiarity with the customary designations of coins sold on this site.