I just received my keyboard today, and it's definitely NIB. The PCB is perfectly clean, the keyboard had a line of dust on the top end of the case and a few smudges on the back, probably not perfectly stored. The coiled cable looks like new too. It's from the old "made in Germany" line but it uses clamps and not screws. It's MX Black and the keys are doubleshot. It also has the standard 2KRO. The F and J keys are extra curved.
The keys are a mixture of white and a rather dark gray. Enter, Backspace, Shift, Tab, Caps etc. have picture and no text. The "S-Abf" on the front side of the Druck key is dark green. Weird.