I have seen pictures of apparently older opinels with what seem to be carbon steel lock rings. sometimes they are patinated and sometimes plain rusty. I want one. mine seems to be stainless, and it might sound strange but i don't like it as much when they mix stainless and carbon components on a knife. when the blade is nicely patinated, and the spring or in this case lock ring is shiny, it seems to be a mismatch. Does anybody know how I go about finding an opinel with carbon lock ring, or even one of the smaller non locking ones with carbon collar?