Thank you very much to the members of the forum because you allowed me to identify this Rare caliber, based on the valjoux 22GH

 

Very interesting. Perhaps some more pics

 

Below is a comparison with a Longines that was mentioned in this thread: https://omegaforums.net/threads/longines-rare-15cal-auction-in-hk-but-suspicious.165500/. The dials share a number of similarities. EDIT: I forgot to mention that the Longines, like the Zenith, uses a Valjoux 22GH movement.

 

Got the watch from @Flybackwatch and posted a video here:
https://www.instagram.com/reel/Czu_U_IrZhu/?igshid=MTc4MmM1YmI2Ng==

 

crazy timepiece! congrats

 

Still interested in a movement pic ;-)

 

Very interesting. Does it have a 500k serial?

 

Yup, 551xxx.

 

Interesting. Seems a UG in disguise https://www.sothebys.com/en/auctions/ecatalogue/2013/important-watches-ge1304/lot.196.html

 

Doppelganger indeed. The Sotherbys description is off - this is 37/38mm without crown.

 

Good time to share mine again.

 

I'm impressed by the condition of the dial!

 

And 45 min counter...
Most of these very early Compur chronographs have a telemeter scale.

What was the UG hammer price at the auction?

 

Huge congrats btw!
As the very first two pusher chronographs by Zenith these are El primero in an other sense.

 

6.875 CHF