Vintage Omega dial question

[actionkwj]

Hey TRF, I know this is a Rolex forum, but I've been checking out an early 70s Omega chronograph I really like and I have a question about one I found. Per the attached photo, I have highlighted a couple of areas where it looks like there is perhaps old lume flaking? I've seen the same thing in pics of other watches of the same model, but I'm not sure exactly what this is. Any feedback is appreciated and thank you in advance.