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because the stone was never used before I got it, it was a very very good stone though.

yeah that stamp is interesting an appears on all older nakayamas

Here are two links with the current stamps that Hatanaka uses:
ƒ}ƒ‹ƒJ�ƒ�^�³–{ŽR‚Ì�à–¾�@‘å�H“¹‹ï�ê–å“X(PROSHOPHOKUTO)

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The second pic is of older stapms (when Kato...

Right I am aware,I follow him pretty close

They have not been active for over a year I think.
I do not think the fake stamps are going to look different than the real ones.

That guy makes gutars and has very cool youtube channel, he has a lot of Jnats that he uses in his plane sharpening videos.

Iwasaki never was in the stone business, people from the forum met with him and asked him specifically.
There are a lot of fake stamps out there that are used on low quality stones with intent to...