mkvc
1382
The basic point is at most 10 seconds/day variation from slowest to fastest.
The chronometer testing involves several tests, but its most important part can be summarized as requiring that the variation between the watch's fastest and slowest position (and in different temperatures) is not more than 10 seconds/day. It also requires that the variation take place within the range -4 to +6. If you have a watch with low variation that is running at the wrong speed that can be regulated; if you have a watch with high variation, that is much harder to correct.
What is a chronometer certificate worth?
Hello to all PuristS, I have been reading this site for at least two years without registering. This is my first post because I really need your opinion on something I find rather strange. So, here it goes: I have a small collection of watches and that I ...
First....pisoi....
Welcome to the world of a poster rather than a lurker ! That wasn't so painful was it? Next, a slap on the wrist for taking 2 years to lose your posting virginity - is that a PuristS' record? That is why the more stringent tests at 'Qualite Fleurier' and ...
A slap on the wrist? Well, maybe I deserve one...
...but you'll have to wait until I take off the mega-complicated extremely limited edition five-year waiting list watch that I'm just wearing (brand and model witheld for personal security reasons). You know those flying tourbillons are not as shock-proof...
It's very valuable: it gives you a license to complain to the manufacturer.
In my experience, if you don't like the way your watch keeps time and complain to the manufacturer, you stand an excellent chance of being told that the watch is "within specification" and the manufacturer will not correct it. If your watch has a chronome...
Chronometer Certificates only assure consistency
Hi Just thought I will share with you some remarks on accuracy and consistency of watch performance ( I came across this in FPJourne catalog on the subjet of chronometry). Typically a chronometer certification certifies the deviation of the watch in vario...
Looks like good news.
Since it means these watches are certified as being accurate and therefore can be set to run properly (within limits) using the rate regulation mechanisms found in all of them. Thanks
Thoughts
Hi Narsi, I'm a bit confused about some of the points in the info you quote. For example, I'm not at all sure that variations in gravity are a major, or even a minor, concern for wristwatches. Given that movements like the Lemania 5100 are known to be abl...