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Thanks, I do have the Shapton glass stones, Nortons and Barber hones as well as some coticules. I did not look at it closely when I purchased it. I would like to identify it but suspect that may not...

Both sides seem pretty fine...maybe 1k and 4k just guessing. Never had a reconstituted coticule.

I purchased is stone thinking it was a coticule.223704Closer inspection makes me believe it is not. It seems to be backed with a very fine grey carborundum.223705