A Camillus, but just which one?

[Scooter er 2]

Gentleman
I’m new to this world of pocketknives and have been enjoying looking through the many and varied forums (Camillus mostly), FAQs and topics. That said, I decided to dive in and ask about one of my knives. I realize its condition is only fair and needs some cleaning (the gray “coating” on the handles for instance), etc. It was a good pocketknife during our many working years and I’d like to give it a sprucing up as it goes into a well-earned retirement.
What I do know. Thank you, forums.
1. Camillus- tang stamp used from late1960s to 1970s.
2. 3 ¾ “ long- closed
3. Single blade- ?spear point style
4. Handle: a black composite material
5. Single bolster
6. No bale/shackle- never had any
Now for your help. What the heck type is it?
I have looked through many of the Camillus posts but have come up empty.
Your thoughts and suggestions on what I can do to clean, refresh, etc. or particular posts to look at, will be gratefully received.
p.s. Now, if you tell me it is a special prototype knife made to test a new style that was never produced but is worth a fortune I… OK, OK never mind- dang reality.

[Ridgegrass]

Welcome to the AAPK site. That knife is a "bare-head" jack, meaning a single bolster. Just a regular, work knife. I prefer to leave them as-found, other than a little oil at the joints and a sharpening if you intend to carry it. It's what we here call an "HOK", honest old knife. Good luck with it. J.O'.

[Scooter er 2]

Welcome to the AAPK site. That knife is a "bare-head" jack, meaning a single bolster. Just a regular, work knife. I prefer to leave them as-found, other than a little oil at the joints and a sharpening if you intend to carry it. It's what we here call an "HOK", honest old knife. Good luck with it. J.O'.

Thanks for the information, "bare-head" jack, just what I needed to know. "HOK" that fits it exactly.

[CutleryCollector-com]

Unfortunately, the "grey" coating is what happens when you leave a knife in a piece of clothing and it goes through the wash.

[orvet]

The grey coating on the handle is oxidation of the plastic. It can also be caused by leaving the knife in the sun, or sometimes they oxidize just setting in a drawer or a toolbox.
A light machine oil, like 3 in 1, will usually make it dissappear, and restore the original finish, if it is only oxidation.
Handles that have paint or something else on them may require more vigorous cleaning.