That is a really great looking Flightmaster!
You know what? If you want it to be an unique piece, ignore all recommendations above concerning case polishing, and exchange of/ touching up parts.
All that watchs needs is a supersonic bath of the case, and the bracelet too. It will also need a new crystal, and a new gasket underneath the crystal, because the present one has blead. Be very careful when you remove the old one, because it can destroy the printing on the inner rotating bezel.
The movement will need a service of course.
Whatever you do, don´t polish the case, and don´t exchange any parts if not absolutely necessary. Don´t touch the hands. If you stick to this, I´m pretty sure you have a GBP 2k watch, which will continue to raise in value in the future.
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