This is Lionel number 6-18374, the JLC GG1 in the silver scheme. Do they all have serious zinc pest problems? I have not seen one without major zinc pest on the truck side frames. People are still trying to sell these models for $900, which seems crazy since the replacement parts are long gone, and even if you could find them, the replacement parts would likely have the same zinc pest problem since they were manufactured at the same time.
Original Post
