A decade ago, a funny money mystery fell into the hands of scientists and students at a university in Peru. The 10-cent piece was marked “1899” — but, according to those who made the money, the coin denomination never existed.
https://heritagesciencejournal.springeropen.com/articles/10.1186/s40494-023-01092-2 (open access)
Figured that in the paywalled article, confirmed in the open article.
Well that was pretty obvious. What else would the explanation be, it’s from a parallel universe? They’ll make an article about anything weren’t they.