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But in your previous post you said that any stone that does not have the stamps from your link, is not authentic or am I missing the meaning? Vintage Nakayamas are stamped with different stamps,...

Except for the vintage ones had different stamps, and different wholeseleers have different stamps too.

He just did, most counterfeited stone is Nakayama, because they sell for the most money.
Almost any stone you see sold in Japan online is claimed Nakayama, no stamps no nothing.

Truth about Ozuko...

330 mate stone with a lot of holes in it, hope it works for you.
The Nakayama stock is owned by Hatanaka which is not the same guy, the mine was sealed in the 60's and is not mined anymore.