I found this knife in my grand parents house a while ago. The story behind this is that my uncle was given this knife by some people he knew in the Air force who he had befriended while working in DC. It looks a lot like knives made by Camillus for the Air force during that time but this one is made by Ontario. Did Ontario have a contract with the government to produce knives for them or is this for the civilian market? Also the leather sheath looks a bit rough is there any steps I can do to protect it from further aging?