Inherited Constellation, opinions on patina/dust

I inherited this watch from a relative who was a Norwegian sailor and its only previous owner. I'm going to have a vintage watch guy look at it, maybe clean it up, but I'd appreciate some opinions up front.

It was probably bought in the sixties, but I don't know exactly when. As far as I've been able to research, it might be a Constellation 14381. It runs fine and has been serviced at least once, but that was maybe 20 years ago or more. The thing is, it has a bit of an uneven patina, which looks kind of dirty, and I don't like that look, so I was thinking of getting it cleaned up. Also, there is some little fragment loose inside, which will sometimes stick to the inside of the glass for a while. The hour hand doesn't have that middle bit of material that the minute hand has, but it seems to have fragments of it (sorry about not getting a better picture of the hour hand), and this looks a bit like the piece of loose material that can stick to the inside of the glass sometimes.

I don't know how much was done about the grit/dust-situation the last time it was serviced, but maybe nothing? And in that case why? I don't really know what is patina and what is dirt or dust. How much can/should I get cleaned up here?

Thanks. There is no radium, otherwise it would still glow , right? It doesn't at all. If nothing should be done to the dial, I'd at least want to get the loose fragment(s) out and the second hand sorted.

Never seen that 'High T' before, thanks for pointing out

Thanks. I'm in Oslo, Norway.