You are spot on Jerry! Nu-Pearl & Sea-Pearl are Camillus’ name for pyroxylin. I think they were even registered like Staglon® was the registered trademark of Schrade for DuPont Delrin that was made to look like stag.
I am always mindful when consulting Wikipedia that it is user written, on other words anyone can write an article. I am sure they have some sort of vetting process but I am not sure what exactly it is. So I always try to check what Wikipedia says against other sources. A good source for celluloid info is the Knife World article by Dennis Ellingsen: “Celluloid - a Firm Maybe.” http://www.oregonknifeclub.org/celluloid_02.html
Dennis says ‘Celluloid’ was a brand name for pyroxylin or cellulose dinitrate, like Kleenex is a brand of facial tissues. The term celluloid is what most knife people use to refer to cellulose dinitrate or pyroxylin. The terms seem to be used synonymously at least when it comes to knives.
It is a great article that I refer to often with questions about celluloid. Dennis is a meticulous researcher and a good writer. There was also a recent article in Knife World (in the last 3 or 4 months) on celluloid that I have to study through. I just skimmed it on the first reading. I don’t recall who wrote it, but you might wish to consult it as well.
Nice little #24 you have.
It appears the celluloid has not gone south yet. It may have a lifetime of use left in it! You can loosen the blade by clamping the blade in a vise as close to the bolster as possible, (preferably clamping the tang of the blade), and rocking the knife gently side to side. That and some Quick Release Oil may be all you need to do to have a good user. If you tape up the handle you can sand down just the bolsters then polish them and remove most of the dings in the bolster. A bit of superglue under the handles and a couple minutes in a clamp may make those handles stay down. I have used superglue on celluloid before experimentally and it does not seem to bother it.
A bit of work and it will be nearly as good as new, or good enough for a nice EDC!
Nice find for <$5! But I agree, a nice bone handled #33 is pretty hard to beat!