This is a good discussion. What is so tough about these keys is how simple they are. It would be so easy to fake one that looks just like the one Dave posted. I agree that it is likely that Dave's is original. I guess I would just never pay a lot of money for one of these. They scare me off which is why I have passed on them in the past. That said, if one was cheap enough I would likely take a chance and live with the uncertainty.
And why do they have no inspection stamps of any type? Also, could one of our German speaking members please translate the writing for me? Thanks!