Actually the trains (M Train to be exact) were built in 1979. They were refurbished with new front end as depicted in the Tomy train in 2008
I found a photo of a M Train with original front end. I am having trouble inserting the image here for some reason. Anyways, I attached the link below for you to click
https://en.wikipedia.org/wiki/MTR_Metro_Cammell_EMU_(DC)#/media/File:Mtrc79.jpg
As you can see, it does resemble one of the JR train (I can't remember the name of that train) but it has silver livery with green stripes.