If you google W.1.4034 Stainless Steel it will list saluc.com, a ball bearing vendor who has a chart listing compositions of various steels. This one is .28% carbon, so pretty low for blade steel. It's about halfway between 420J2 and AUS 4. By way of comparison, the carbon content for AUS-8 is .7, ATS-34 is 1.05, and S30V is 1.45.
So don't expect good edge-holding, but depending on your use, that might not matter.
Incidentally, I would have given a couple months of my busboy pay when I was 16 for a knife like that. My cousin had one that some male relative had brought back from WWII. Now that I could get one if I want, it doesn't interest me all that much. To me, any knife from Spyderco, Kershaw, Sog, or CRKT is 10 times better...stronger, sharper, and just better in every way. If you want a stilleto, Darrel Ralph makes some good ones, and no doubt there are others. I do still like the double guards those knives have.