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That I'm aware of, there was no grading system in place by which a distributor would make a different colored border on a more fine stone, or vice versa. And hardly necessary when a single trial...

What can I say? I'm a little obssessed when it comes to natural razor hones...juuuust a little.

I think the one picture you found is Geezers stone. And his is the only one I've seen anywhere with that label also. But I might be wrong, and his might have a more complete label than I...