I have a dummy N engine that looks like part of one of those modern, fast trains. On the bottom, what looks loke the brand name, is injapanese characters inside an oval (maybe this is the logo) then, next to it, it reads "1:160 scale, Made in Japan". Does anyone know what brand could it be? I've never seen one Kato or Tomix, but I suppose that those brands have the name written in our characters but I 'm unsure of this. Thanks!