In the spirit of the internet Bushcraft trend of pulling out our tools and comparing I decided to join in the fun. This is the patch / neck knife I purchased back around 1986 when I first started getting primitive.
This one was made by a bladesmith from an antique crosscut saw and has a beautiful tiger-striped maple handle. This is probably its third sheath but it’s the one I’ve stuck with since around 2001. It’s been camping and on thousands of miles of field projects, not always around my neck but almost always close-by in my pack. For some reason, our society thinks you’re a little weird if you wear a knife around your neck all the time.
Preindustrial Craftsmanship 
Hello,
How does the knife clip into that wooden pouch/sheath, thinking of making myself one.
It fits by friction supplemented with a little wax in the sheath from time to time. The sheath also stays upright as the weight is all at the bottom half. It has rarely fallen out over the past decades of use.