More details added, not very good pics here as they are under poor lighting, but you can make out that the cockpit divisions have been added, these are made from sections of metal litho printing plate. Also, barely visible in these shots, the escape capsule lines have been scribed and the forward periscope tunnel has been carved out, I added the cockpit instrument pedestals in brass wire, although they are certainly too small to see well on these pictures, but you can just about make them out glinting at the front of the cockpit area:
Chock