Haha! I'd forgotten about the blue versions, and even the grey ones.
Some great footage in those above videos. Brings back some great memories. I used to hang out of the doors looking up the tunnels on the city circle. Must have been where I got my train nerdism from.
The windows used to drop from a great height with speed when you released the latches on either side. It was a good idea to keep the fingers out of the way.