Is this not a blatant redial or has Sotheby's missed the mark? The lack of bidding surely supports my case...

 

...a member of the "closed 6/badly-printed/omegalike-Swiss-made"-club.

rgds - h.u.

 

Redial... and I think it has also been repolished.

 

I believe Christies also sold a redialed 13zn in their November auction.
Ref 6486 for Romanian Air Force s/b



The one sold:

 

I have come across a number of 13ZN's with this dial and I am still uncertain about its originality. It appears in a variety of cases that span many years and is often found in examples that have other uncharacteristic features. The cynic in me is highly suspicious. If only I could find a period catalogue...