I saw that neat little blade I thought you had made it...looks like your style...
the number should be on the ring--I occasionally carry a 10 or 12 or Rajah 2, usually carry CS XL Vaquero Voyager
I forget which Opinel model# this is, but it has the 3.5" carbon steel blade. I opened up the pivot slot a little bit to make it easier to open, so opening it one-handed is not too much trouble now. The thin cross section is easy to keep sharp and the classic old-school look is just what I want in an everyday knife.