Amakusa (coarse) from Morihei maybe ~800 grit, size 15 (quite big)
Binsui, ~1500 grit, size 30 (good size)
Beston 500 Coarse stone, has some use, lots of life left
These are heavy and cheap, so I'm selling as a set, let's try $75 for the three, including PP fees and shipping in the U.S. They...