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| Author: | Hudson County Breitling [ Wed Aug 29, 2007 7:59 am ] |
| Post subject: | My watch loses time... |
Is it normal for my Breitling to lose time? I have had the watch for about 8 months. I recently had to set it becasue it was about 4 mins behind... Please advise... Thanks Chris |
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| Author: | Roffensian [ Wed Aug 29, 2007 9:19 am ] |
| Post subject: | |
Assuming that it is a relatively modern Breitling it is COSC certified as a chronometer. That means that it is accurate to within -4 to +6 seconds a day. Any gain or loss within that range would be considered normal. If the watch is new (assuming it is automatic) it may take several weeks for it to settle and until then it may lose more than 4 seconds a day. On the other hand (again assuming it is automatic) if the watch is several years old and has only just started losing time then it sounds like it is time for it to be serviced. |
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| Author: | Hudson County Breitling [ Wed Aug 29, 2007 10:31 am ] |
| Post subject: | Thanks |
I appreciate the feedback. It is a newer model, less than one year old. I will keep more careful attention to exactly how much it loses. When is it appropriate for a typical service? Regards Chris |
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| Author: | Roffensian [ Wed Aug 29, 2007 11:01 am ] |
| Post subject: | |
Well not 8 months! If you are using the watch for 'normal' wear you should be good for anything up to 5 or 6 years. However, if you regularly rely on the waterproofing qualities of the watch - swimming, diving, etc, you will want to get it serviced every couple of years to ensure that the gaskets are still good. |
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| Author: | Flynbyu [ Wed Aug 29, 2007 2:26 pm ] |
| Post subject: | |
If you own a chronograph, and you are using the features of the watch, I have been told by a few jewelers it can rob it of a little accuracy. I've found this out with a Fortis Flieger I own. It seems I loose two minutes a week to my Rolex Submariner if I'm using my Fortis while flying cross country trips timing my checkpoints. If I don't use the chronograph features, the watch keeps better time. Just my two cents. ~Brian |
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| Author: | roadcarver [ Thu Aug 30, 2007 7:06 am ] |
| Post subject: | |
Using the chrono should only take away power reserve, accuracy should not be affected. 4 min behind - hard to tell, for sure it is loosing time, but how many sec per day are we talking about. The best way to do this is observe it for a month. Set your watch based on a reference (atomic clock), observe it for a month and see what the delta is. From where you can calculate the the +/- is for the day. If it is well beyond the COSC specs, go back to your AD and have it regulated, providing they have all the tools including a water pres tester. Pls bear in mind that COSC testing are done on movements only, no hands and they're not even in their respective cases. So when the watches are sent to the ADs, the movements may hit a bump during its travels and could cause some deviance. Best, Vernon |
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| Author: | Alien [ Fri Aug 31, 2007 3:07 am ] |
| Post subject: | |
I have to correct Vernon: COSC testing is now done optically on the second hands of the movement. That is why the UTC and the Copilot are the only nonchronometers. Greatings Thomas |
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| Author: | roadcarver [ Fri Aug 31, 2007 4:39 am ] |
| Post subject: | |
Ah, that is something new. Thanks for the correction, much appreciated. Alien wrote: I have to correct Vernon:
COSC testing is now done optically on the second hands of the movement. That is why the UTC and the Copilot are the only nonchronometers. Greatings Thomas |
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| Author: | 1st timer [ Sat Aug 29, 2020 6:09 am ] |
| Post subject: | Re: My watch loses time... |
4 mins in 8 months? That comes out to about 2 sec per day. That's extremely accurate for a mechanical watch. |
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