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Omega

Yes ... and no ...

 

The HB-SIA is equipped with the caliber 3603 (that I believe it's a 3313 with the addition of the GMT complication).
Many terabytes had been written about the Omega 33xx family issues but I have/had many watches from this family and never experience a single issue.
This movement family, along with all modern Omega movements, requires a trained watchmaker to perform any maintenance or else.
Cheers,
Nilo

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