I only have a half dozen variations of this series. I can scan them (which I've already done, but I can never remember where I leave the images or what disk they were one)

The story goes... that Paulson made the Presidents set and was selling them out of the stores. Someone from the Kennedy family complained and they stopped making the JFK chip.

They don't make any of the series anymore and although the JFK chip appears less common than the rest, it's not rare or unusual.

The one in the picture is even more generic since it doesn't have any value marked on it, like the original set did.

These chips were (appeared to be) machine setup and test chips. You can find them in a variety of molds, colors and inserts.

Not Rare, not one of a kind, not worth more than a few bucks, even to someone "looney" like me who colects them.