Your question is valid – and it is confusing.
There was a range of cases, dials, bows and hands. We see your bow in the catalogue image I highlighted – but your case might be as shown in the image to the right. Your hands are definitely used on the watch shown as Ref. 1122. The nearest dial to yours would seem to be in the watch to the right (Ref. 1120) – but I don’t think it’s the same (I don’t see your dial there).
Omega sometimes used even a different calibre in a watch without changing the reference number!
If you look at the image I have highlighted, 1119 is shown with Cadran (dial) 4034. We see the numbers of the other dial versions shown (sometimes with a surcharge – we see Ref.1081 has a Fr.2. - (2 Franc) surcharge for dial 345.
That’s why I referred to
@Tire-comedon, who has many catalogues and interest in this period – and might well expand on my explanation (or disagree!).
I referred to “this particular combination” – it was a combination of case/dials/bow/hands. Although it might be nice to know, I don’t think it’s too important – you asked for some information, and now you know what the calibre of your watch is. You also see what a wonderfully creative world Omega had in the 1930s/1940s. Also with wristwatches – but at that time not to the same extent as pocket watches.
Another variation was the variety of casebacks – different patterns (with names). You will find more detail in this thread: (I show Page 2 because it includes an image I showed of the 37.5 bow varieties – which still didn’t include yours!).
https://omegaforums.net/threads/the-omega-pocket-watch-thread.122246/page-2
But finally the warning that you are entering the dark world of pocket watches and (as
@SOG53 mentioned above) – some people have never been seen again.