Bill
32114
You do seem to be within the acceptable range.
I came across this chart some time back on the internet not sure who to credit. It gives you a range for reasonable expectations.
It seems you are falling in the middle of Modern mechanical watch non-certified at -5 per day. But it seems strange that after each service and time period you get the same loss.
Bill
| Reasonable Accuracy Expectations by Type of Watch |
Seconds gain/loss per day | Best Accuracy | ||
| Worst | Typical | Best | ||
| Vintage mechanical watch in good repair |
+/-60 | +/-15 | +/-5 | 99.9826% |
| Modern mechanical watch non-certified |
+/-10 | +/-5 | +/-2 | 99.9942% |
| Modern mechanical watch chronometer certified |
+6/-4 | +/-3 | +/-1 | 99.9977% |
| Modern quartz watch non-certified (normal) |
+/-2 | +/-1 | +/-0.1 | 99.9998% |
| Modern quartz watch chronometer certified (rare) |
+/-0.02 | +/-0.02 | +/-0.0 | 99.9999% |
Breguet 5817 slow
I have had this watch for three years now. Initially it kept very good time - plus or minus about 30 sec a month. Two years ago it stated to fall behind - about 1 minute a week. I sent it to Breguet for repair. It took them three month, but when the watch...
You do seem to be within the acceptable range.
I came across this chart some time back on the internet not sure who to credit. It gives you a range for reasonable expectations. It seems you are falling in the middle of Modern mechanical watch non-certified at -5 per day. But it seems strange that afte...
Is there a published spec for the watch?
Bill, thank you for the response. The table is interesting, but I am wondering how it relates to this specific watch. Do you know whether Breguet ever published a specification for the watch? I found a description on this site http://www.presentwatch.com/...
The example I provided was a guide
It was merely to represent the fact that mechanical watches have margins in which the operate. But I do think you should try and find out why you get such a variance after each service which seem not to be normal. Bill
Bill, thank you for the...
Bill, thank you for the infromation and encouragememt - very much appreciated. Best regards Slava S.
If you have access ...
To a watchmaker that has a good timing machine (the moderns Witsch are great) I would suggest that you do a quick check. There you can remove the potential ambiguity and check if your watch is under the correct parameters on all positions. I do this check...
Hi Nino, this is a...
Hi Nino, this is a very good point – thank you. I will follow up and let you know what the measurement shows. By the way, I found the e-mail from Breguet service manager where he explained what they found when I sent the watch for repairs. His respo...