It is definitely a novelty item. Is there any markings on the reverse? My guess is a company or organization did this for their 20th anniversary.
Oooo, I hope you didn't pay over 50 cents for it. Or more likely to commemorate the 20th anniversary of Kennedy's election.
I've found a few of these roll searching. I kept them just to have. I'll sell them all to you for the low introductory price of $20 a coin. But if you act now I'll cut the price in half to just $10 a coin. That's right just $10.