Kanoyama 80000, bought used about 6-7 years ago. It’s well polished and has had no ‘treatment’ - I even stopped hand rubbing it since that seemed to make it dirtier.
That's it, I am starting a Kanayama piggy bank. I have to have one of these at some stage. Since I only really shave with kamisori's these days, it's the only right choice if I am to upgrade my strop!