I think that knife is far to big to be considered a Nessmuk knife. The Nessmuk knife has a very thin blade, very light weight, and not really suitable for chopping.The Nessmuk is primarily a skinning and slicing knife.
The knife pictured is more akin to the Hudsons Bay Camp Knife. A good heavy duty tool, but not a Nessmuk knife.
Is this the ultimate buskcraft knife? I think this knife would be a good camp knife for Alaska, Canada and the Rocky Mountains, but for an English bushcarft/spoon carving camp I would say no,