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Old 19 September 2024, 01:32 AM   #1
sakolander
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Chronomat accuracy

Just got the 40 mm Chronomat GMT....beautiful!....
But, it seems to be about 7 seconds slow per day??
Is this common??
No warranty so don't want to send it to Bretiling....
Not too bad, but a little annoying....
Anyone else with this experience????
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Old 20 September 2024, 06:59 AM   #2
sakolander
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No one responding???
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Old 22 September 2024, 10:56 AM   #3
Guppydriver
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The Chronomat uses a base ETA 2893-2 if I’m not mistaken. I would imagine +- 10 seconds is technically within tolerances. I’m not sure though. I would hope for around +-5 so I agree 7 seconds would be a little frustrating. I doubt it’s COSC certified.

Very pretty watch thought, wear it in the best of health.
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Old 27 September 2024, 11:17 AM   #4
jdcdpm52
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I would suggest to give it some time to settle. All Breitlings are COSC Chronometers. I purchased a new Superocean in February. It was running at + 8 seconds per day for about 2 months (I rotate quite a few watches so it was not an everyday watch but a couple days per week). After a couple months it settled down and now it regular at +4-5 seconds per day (within COSC standard).
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Old 28 September 2024, 05:44 PM   #5
Gollv0
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During the last 12 hours of reserve, my chronomat B01 lost 20 seconds. A little confusing since it has been stated that the watch should be running faster.
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Old 1 November 2024, 12:17 PM   #6
sakolander
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An update.....
Yes, after wearing it for a few months, it is running about 4 seconds fast per day...
Within standards and am happy!!!....if it does not change!!!!
These watches are just so sharp to wear!!
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