Pah! I have one of those old green label blacks that everybody goes giddy for, and by far the best thing about it is the spiffy Norton cardboard triangle box it comes in. It’d be out the door pdq if it wasn’t for that.
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The big problem for me is that they burnish very quickly, and really struggle in terms of actual abrasion on modern steels above about 61-62 hrc...
And I will die on this hill!
Keep the box and send me the stone I have an HM8 Norton and a HB6 and both are great finishers.