Yes they're rare! Extreme rarities in many cases with 1-10 known for a large number of patterns. The coins themselves are attractive too and have the appeal of being the representation of what might have been. Many of them just don't come up for auction and are currently in strong hands. In addition, the Smithsonian and other museums have many, some of which are unique. I agree that you should get a book about them. It's an interesting topic.


















