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Opened July 1999, zOwie is the Internet's first and longest running discussion forum dedicated to Omega brand watches.

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Re: Can I trust Swatch Group estimate for Planet Ocean repai
In Response To: Re: Can I trust Swatch Group estimate for Planet Ocean repai ()

: COSC is I believe -4/+6s per day, but Omega have their own tighter
: spec which is -1/+6.

: I've often wondered why both aren't symmetrical? Just because it's
: better to be early than late?

From the Omega website:

What are the precision tolerances for an Omega chronometer?

To earn the title of chronometer, the mechanical movement’s average daily variation in rate must be between -4/+6 seconds per day, or a precision of 99.99%, the highest precision attainable by a mechanical movement.

The precision of a mechanical movement depends on the individual habits of the wearer and can therefore vary. A qualified Omega watchmaker can adjust the precision of a watch to within the Omega tolerances, which are from -1 to +6 seconds per day.

Thus the OP may has the right to get his watch adjusted under his Omega warranty.

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