I've noticed some brands' pocketknives have/had a more pungent smell than others. For example, I had bought a couple of traditional Camilluses a few years back; a stainless large stockman, and a carbon-steel whittler. These two knives not only have a very distinct smell, but after using or handling them, my fingers smell, too. It's not really bad, only very identifiable. Now that I think of it, the old carbon Schrades had their own scent.
The Case knives are not so strongly scented, but they, too are distinct enough to bring back memories or the days when slipjoints were the main style of pocketknife around.
Also, whenever I buy a new Case, and even when I got the 2 Camilluses, there was a lot of black gunk to be cleaned out of the joints and from the blade tang/backspring area. I'm not sure if it is left over from the polishing or smoothing process, but it too seems to have its own smell.
I don't recall noticing that as much with the USA-made Buck slipjoints, and not at all with the SAKs.
Jim