I didn't take any word from a seller or buyer [:D]. The way the glovebox was made from one piece wood without any vineer, brought me to thoughts that it has to be original.
But what you are thinking, that the backside of the glovebox was always without a glossy finish, I will check in my 600. I never noticed that the backface was different from the front.
That glovebox is one piece of wood.
The shown fotocar is an very early one with the chrome marking in the middle. That was original so.
The one the Hamburger bought from Werner in Austria was a very late one # 5721 !!, but I forgot to take foto's. The openingshandle was different. The shown foto has no openingshandle.
Here is a early dasboard from a mirbach 6.3 with a "Plastic striping"
Autch, took the wrong picture.
Here is the good one for the platsc striping: