Shop recommendation to remove dusts on dial

[Lurch]

I found some speck of dusts on the dial of my watch
It's a gmt watch

Which is the best place I can send to to remove those tiny speck of dusts?
And how much would it cost usually? Thanks

[watches12]

Try Timex, the also carry out repairs and servicing

[Timeless]

Better do a water resistant after removed the dust, any pic to share?

[Lurch]

will take note on the water resistance test.
no actual pic as my camera couldnt capture that fine dust.
heres a sample pic from the net. spot the dust above the 10 marker