I selected this example because it is the one I have recently observed appearing in quantities on the market
Also there is the same style from other countries as well ( N#336086 ), clearly from another convenient “hard to get country”, what I think is at least suspicious that someone wanted some profit creating this coins.
I do not possess proof that these coins are unofficial, cause the burden of proof lies with the contributor who added them to the catalog.
But recently there are some questionable entries, including duplicates and even upside down images, that I always fix when I have the knowledge to do that, but that suggests some coins may have been added without any research.
Well, the Niger paper-thin gold coins have a km# number, so I might be wrong, but In dubio, veritas quaerenda est.