Feels like bone or wood. I cant see how it would be plastic types. I'm also not sure if the Sheath is original to the knife. Hard to know for sure.
Photos will provide all details. Please view all photos for condition! Thank you from Family Mission. Vintage 60s/70s Craftsman USA 7 fixed blade knife w/ Leather sheath Bone Handle. This item is in the category "Collectibles\Knives, Swords & Blades\Collectible Fixed Blade Knives\Vintage Fixed Blade Knives\Factory Manufactured".The seller is "familymission" and is located in this country: US. This item can be shipped to United States.