nickn
I was certain you would be the first to respond as you are typically the one who likes to throw his worthless two cents in.
Measure the grip in the photo. The damaged area is LESS THAN 1/5th - Yes or No?
Absolutely period correct Rune - but don't believe me - call Wittmann.
What you call stain is the absolutely original aging of the blade before I ever touched it with soft, non abrasive metal polish as recommended on this site.
There is no stain - what the hell are you talking about?
Why haven't you posted photos of the blade since I cleaned it. The photos you show are of the blade untouched for over 50 years.
You are well aware that photos angles and lighting often display marks and lines far worse than they actually are.

But I guess you know more than Wittmann.