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What are the COSC limits on automatic watch?
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Author:  *dan* [ Mon Aug 20, 2018 4:02 am ]
Post subject:  What are the COSC limits on automatic watch?

What is an acceptable deviation in time over 24 hours for a Breitling automatic watch. I’m going to measure mine again but it seems to be loosing approx 14 seconds a day. I’m not using an app for this but setting it to a time on a website and then comparing it 24 hours later. Seems to be out but not sure what the tolerances are?

Author:  56scooter [ Mon Aug 20, 2018 4:11 am ]
Post subject:  Re: What are the COSC limits on automatic watch?

The COSC limits are -4 to +6 seconds per 24 hour period! Good Luck!

Author:  *dan* [ Mon Aug 20, 2018 8:29 am ]
Post subject:  Re: What are the COSC limits on automatic watch?

Thanks it’s only 4 months old from Breitling and it’s loosing 15 secs a day. I’m noticing it’s loosing enough time over just a few days for me needing to adjust it.

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