I have a USAF Camillus survival knife and leather scabbard with an interesting story. It was owned and carried by a Lt Col in the Green Berets while he was stationed in Vietnam from 1963 through 1969. He never married and basically lived over there all those years & learned to speak fluent Vietnamese. His nephew was one of my best buddies in HS and I came to know "Uncle Joe" quite well. He also carried a Chicom 7.62x25 Tokarev in a shoulder holster back then and continued to long after he got out of the Army and came back to the States. He was one of a kind and one of the most patriotic men I've ever met.
I somehow ended up with his knife sometime in the late 70's when I was doing a lot of camping & backpacking and would carry it on my belt. I told my friend just this past year I still had his uncle's knife and would return it to him if he liked.
And yes, it still has the well-worn sharpening stone in the scabbard.