Search:

I have to say they are not. What is more helpful is the odd size and characteristic edging. Of course the edging would be hard to address after the stone was re lapped and edges re done.
In my...

I do have all three of them. Yellow Lake is only brand. in this size they were sold in red and blue packaging. I have also seen Salmen's Oilstone (genuine hone) which was made out of carborundum and...

Salmen's oilstone aka Yellow Lake.