KTM (Katsumi), HO, O Scale, Japan during the 1960's. They were imported from
Japan to the USA by Max Gray, US Hobbies, Perfection Scale Models, and others.
Katsumi are still producing brass models limited to Japanese and Chinese (but
not USA) prototypes.
If you want to check out other brass trains as well, feel free to head over to our brass train collection.