Omega oiling numbers

It would probably be better if you posted this in the watchmaking section instead.

According to the internet, that's the viscosity of the oils recommended in those parts of the movement in "stokes". Based on your username, I'm assuming you already have a set of modern oils. You will need to figure out the viscosity of what you have, and use what makes sense.

As an example, Moebius 9010 has a viscosity of 1.5 stokes at 20°C. I'm not sure if the Omega tech sheets also show the recommendation at 20°C or not. See the below chart from Esslinger where "cST" is centi-stokes (1 stokes = 100 centi-stokes) for a range of oil types.

Are you seeing this for vintage Omega movements? For simple, non-automatic movements, you should be fine using common sense with a few different Moebius oils like 9010, 9104, and 9504. I would wait for our OF expert @Archer to respond for confirmation.

Yes, using common sense is the approach - just look at the application, and based on your experience as a watchmaker, choose the appropriate oil or grease I've never seen any sort of direct conversion for this.