last week i had a somewhat similar type knife to sharpen, but it was un-mountable in the WE, so i just used the 600 to 1000 diamond paddles on it, but it was chisel grind job.
That Knife is an Ulu a knife originally used by Inuit woman for food prep and scraping skins.
I have a couple of them. Very useful for dicing and chopping vegetables and as a general purpose knife.
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i got it from the next vendor over last sat…..and that is all she cuts with it – vegtables.