It mysteriously vanished from my dorm room a year ago, so I can't look at it to compare, but I remember the back having something weird engraved on it, I forget exactly what it was. I think it was kind of Engrishy. Like there was an i that was supposed to be an l or something like that. The photo you linked to doesn't show the back, so I don't know if it's the same thing. Also it's probably worth mentioning that I didn't get mine at a big ass convention like A-Kon or Anime Expo, so it could just be a thing with smaller cons.

It only turned my neck green, so I just looped it around my wrist.