All unpleasantness aside, I think you're right in your thoughts as to the age of the coin. Finding any real details about it might be difficult though as it's likely not mass produced, and if there are other examples still in existence, they are probably hidden away, or long forgotten in attics and basements... It's not the kind of thing most people will want to admit they have found in their grandfathers things, or that they are likely to have kept if they had found it.
There are people who collect that sort of thing, for reasons both good and bad, and it will have some value to them. To me it's an interesting artifact of a time in our country that many would rather forget. Destroying these things does nothing to erase that time, or change that past. It only serves to remove reminders that people could have learned from.
