Had mine issued in 70, it's been through hell and back, used it for years. Its pretty worn, takes a great edge when it's needed and the leather washers are just a little dry.
It's not been used since 82 when I dug a tire off my motorcycle on the road as the hand tool that was supposed to work was a piece of crap. Had it with me and used the tip to get under the bead on the rim, twisted it to get the edge on the rubber and after many hard minutes of prying and digging it popped the bands of steel [ I say popped as it really didn't cut through the bands as much as it stressed them enough to snap ] that were encased in the bead of the tire.
Left a small chip in the edge about 1/4" up the tip, which was sharpened away. I have stored it in the sheath, lightly wiped film of oil [ 3-1 ] and it's not gotten any worse since 82.
Another rider had gone for a new tire, when he got back the hand tool was used to put the new one on, can of air, and we were on our way.
It's a knife I've probably used the longest and hardest, actually it is the longest hardest used knife I own. Leather washers could stand a little dressing, they are still tight and no rot. The sheath is about the same as when I retired it, a few years later about 84.
Use your ka-bar Tok, if yours is as strong as mine, a little care and it will last a lifetime, it seems mine has with very little maintenance while it was used. Keep a light film of oil on the blade, just wet enough to see it's not dry, and you should be good to go.
Like hk33ka1, I washed mine under the sink faucet in hot water and soap, dried thoroughly, reoiled and ready for the next adventure.
Thanks for asking and bringing back the memories, there are many with that particular ka-bar of mine.
Brownie