Correct me if I am wrong but this dial is in no way "genuine". Furthermore, Longines never produced a caliber "12.88Z". They did produce a caliber 12.68Z but this was never found in the "Majetek". For those interested: http://milspectime.com/?p=722 Again, this dial is simply not "original".
Don't worry, it's "garantueed genuine" so if the buyer ever finds out, he'll surely get his money back...
Can you send me a link to the thread? I've been in his shop once. Saw a few redials behind the glass. A lot of Rolex.
It is a very long thread but a good read IMO. https://omegaforums.net/threads/very-pleasing-original-dial.38857/