I've never seen any Old Timer with that sort of handles. I wonder if Santa Fe Stoneworks ever used Schrade knives for their product line? Otherwise it's perhaps a tinkering job someone did at home.
Anyone?
I also see similar knives being sold at so-called "Southwestern" gift shops marketed as custom made knives. I've seen similar handles, but much more crude and never made with brand-name hardware, sold by roadside souvenir vendors.
???