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The one I pictured above,,, would take a year & a day to set a bevel on,,,

Then my stone is not a Washita then,,, its extremely hard & smooth,,, a finisher.

Once you lapped it,,, work it in after an 8K,,, see how it shaves,,:shrug:
if it's the same stone as mine,,, it was a beast to lap with a DMT 325.

Does it look like mine,,,,if so then Jimmy's answer is correct,,, my grandfather used this one daily in the early 70's

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