Vintage Omega Help Needed

I'm looking to see if anyone can provide me a little help in figuring out more information about this watch. It was my grandfather's watch that was passed down to me.

Back in 2017 I had it serviced by Omega but they were unable to do the Extraction of Archives, the boutique said it might have been due to a loss of some records due to a fire a few years ago? The information they were able to provide me was the following

Caliber: 1332
Case Reference Number: 196.0175

I can get more pictures tonight if that would be of any help. Thanks!

Just updating with a few more pictures. Thanks!

Thanks! Yeah, definitely way more sentimental value to me than anything. I guess I was hoping to find a little more out about the model, year of manufacture, etc.

Basically all I can know is that (from the dial) it is a Constellation and the service gave me a Caliber and Case Reference Number. My main issue is that when I try to even search on Omega's website I get a grand total of nada. Any help is greatly appreciated!

Not my area of interest although it's a nice memento. You might find some information here:
http://www.old-omegas.com/

Possibly in this catalogue?
http://www.old-omegas.com/prestonuk81.html

Good luck, Chris