FWIW: I made that same Pacific RGR knife many years ago.
It started out life as a Patch Knife and it worked just fine in that role, but it somehow ended up on my work bench and, for the last several years, my bench is totally naked without that little knife.
That is, without a doubt, my go to blade.
It's uses are unlimited, and it has a size that is just plain hard to beat.
Hardly anybody stops by the shop without asking about that little knife. I have no idea what the composition of the metal is, but it seems to stay sharp as long, maybe even longer, than any knife I've ever had and I cut some pretty bad stuff with it, sometimes....for one thing, I'm terrible about stripping wire with a knife, especially when I know that knife is sharp.
Good job, PD
And, a good thought about saving those Old Hickory knives. They've been around awhile, and they are just as good today as they were years ago.
Uncle Russ...