While a nice-looking watch, this one has issues.
Note the corrosion of the case back, the signs of moisture entry, the corrosion of the movement, the rust/corrosion on the dial side in the area of the cannon pinion and the hands.
I fear this would be an expensive service and could only be improved to a certain extent (if you're lucky).
To me, an American market (OXG), gold filled, non-Omega cased 550 wouldn't be worth it.
Good luck, welcome to the forum and congratulations on asking first! Many don't and pay a tax.
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