Hello Erikson, I'll get in touch again,
When looking at the knife and the traditional sheaths, I thought - the leather sheath is made really simple for such a special knife. It is very similar to the knife sheaths of sailors' knives.
But the Scandinavian knives also have such sheaths.
In its basic form it also corresponds to the Norwegian knife tradition.
So it should be pretty easy to make such a sheath. In view of the particularly artistic handle of the knife, an ornately decorated knife sheath (as Havard Bergland shows it in his book) would of course also be very suitable.
I wish you much fun while producing the leather sheath.
Greetings, Ralf.