I seen a lot of sharpening stones in my 50 years of playing about with tools, but this is the most worn I have ever seen !!

All that wear with zero sugar? Must have been the caffeine

If I'm seeing it right, it's the fine stone that they wore out.  Must have been frustrating, aiming to get a nice final finish and hitting the medium (or coarse, can't tell from the photo) grit every time they got halfway through a honing stroke.

That's the worst dished-out stone I've seen in my lifetime!

Got to remember how to sharpen. Got good at it when I was mostly buying used knives, then got out of habit when mostly buying new ones, now after dulling most of those, I've forgotten, and am making messes again.

looks like a good ebay sale..lol,at least its not a Belgium coticule

yes its the smooth side that's worn out

Is that for making a spoon?