I can't clearly tell what years the real E10 was operational for but I was thinking about a trix 2-10-0 I had thats been disassembled for a very long time to the point that I don't know where any of the spacer gears for it is anymore (meaning it'll never ever move on its own hehe)
and when I thought about it I had to look at the steam locomotive list for a moment before figuring out that one of the E class could do it and sure enough if the rough chassis dimensions (especially suggestive tire dimensions) matches I could rip out the useless motor to make it easier to modify the cab into a fully enclosed one (coal bunker as part of that too) with viewable interior on top of a few other easier items.
after that I'll see how to fit one of the spare freight truck underneath the cab to make up the trailing axles then try figure out what to file or add along the boiler length, by then I should be quite close to a rough model of the E10 itself

don't know if I should paint it as something thats still in service but 'currently sitting cold for good' in the engineshed...or even just paint it more as something thats starting to rust on some dead track out of the way?
heres a direct url if anyone want to see what it looks like, I only could figure out a few basic technical details but nothing else yet
http://ja.wikipedia.org/wiki/国鉄E10形蒸気機関車
and this is what my 'drive-dead' locomotive looks like except for the letterings
http://www.hydroponicsonline.com/store/img-hydroponics/n-scale-2-10-0-a-t-s-f-trix_300551169169.jpg