Hi All.
This is my first post on this forum. I was hoping people more experienced than me could help me validate authenticity of what seems to be a great sample of early 1980's of Meisterstuck 146.

In general it looks authentic even with some "patina" in the nib which doesn't look like it was used a lot.

What bugs me is the sticker on the side saying :"M \n W Germany". Too new to be truth?
The boxing is also interesting and seems legit, given that Varig was an important air company in brazil in the 1980's.


Some pictures...

Nib looks weird, but could that be just "patina"?
Nib.jpg
Zoom on the ring.
Zoom.jpg
Nib from its back
Nibback.jpg
Sticker:
Sticker.jpg
Full pen:
Full.jpg
Box Pics:
Box.jpg
Box Back.jpg

Any feedback is greatly appretiated!
Best regards!
Walter