The city of Ueno, Nagano Japan released a historical model of ED25, among their first electric locomotive and it’s wagon paper craft.
Manufactured in 1934 and 1944, it’s main used is to pull wagons from Matsuo Mine Railway. Probably used a lot during WW2.
It is now preserved in Matsuo History and Folk Resource Center in Hachimantai City, Iwate Prefecture, Japan.
There is not much info I can find about it in English or Japan other than pictures of it. Suppose the only way to know more is to visit the place itself.
Paper craft is easy enough to build, not much folding and most of the parts are boxes and only a few small parts. Model come with ED251 and wagon