Very intruiging Aero Compax on insta: https://www.instagram.com/p/CWIa_1orfeC/?utm_source=ig_web_copy_link Reference 22414 and serial 798k. I've asked whether the bridge is marked UG or Siegerin. Not much to be found on this connection but for this one (which unfortunately has no pictures any more): https://www.watchuseek.com/threads/siegerin-with-ug-285.1042276/

 

Had contact with the owner. This is really very intruiging. 100% legit IMHO (but for the relume). Serial is in a well known range of 3rd party labelled UG's. What is really unique (as far as I know/have seen) is that the bridge is not signed. Some more pics:

 

Same guy found another one

 

Here's another one:
https://www.instagram.com/p/CJIQSwLLEtP/

 

Another one: https://www.kleinanzeigen.de/s-anze...sal-geneve-262-armbanduhr/2577266677-157-9360