Hi, can you help me find what model it is? My grandfather bought it in the '70s.
Many thanks.

 

You said yourself: Cosmic 2000. That's the model.

 

Thx I am looking for code number

 

Possibly a 166.130.

Have you used google to try and find a similar watch with the reference stated?

 

Second that, it's a ref. 166.130 (Date), Day-date is 166.131 and bracelet is 1171/677 and/or 1175/677.

Cheers,

Winny

 

very cool model with that 70's vibe! from what I recall the center section of the watch pushes out and separates from the outer case shell?

 

The bracelet in your pics looks like a 1162 with filed 172 or 173 end links.

kind regards Max

 

That's right, and the inner case looks like this one here (pictured from my 166.135).

To open that case one need to pull out the crown and put some compressed air in to get the caseback blown out. Strange method to increase WR that days

 

I had, but as you can see on this link below 166.130 is a little different.
https://www.chrono24.co.uk/omega/omega-cosmic-2000--id13190695.htm

 

That's because the seller failed to do better research, asumingly. The reference of his watch is 166.135, for sure

 

This is it !!! Thank you very much

 

Interesting model you got there.

 

And this is a picture how it looks it now