Like I said, I don't have anything more on this truck.
But do you know the story of the rabbit that crossed the border between East Germany and West Germany?
He meets a western rabbit and says to him "phew, I had a narrow escape! Tomorrow, they open the bear hunt!"
The western rabbit says to him "but that does not concern you, you are a rabbit!"
So the first states "of course I'm a rabbit, but I don't have official papers to prove it!"
Good luck to the researchers in finding the details