Markings on Ontario PSK

[Cicatriz]

Howdy

I'm trying to find information on what looks like military markings that are hand written and hand engraved on an Ontario 499 PSK.
The knife was made 5-01.

The ricasso is engraved and the leather handle is marked using a sharpie.
The marks are;
KC5
KP1176

I realize this is probably a serviceman's ID.
If at all possible, I would like to find out who it belonged to.
This is probably a long shot.

Thanks for any help.