Re: Question on accuracy of Tissot watch

What Bo said.

Mechanical watches are known to be sensitive to position (the direction the
dial is facing) because of gravity - the balance wheel spins like a top when
the watch is flat but rests on its axle like a wagon wheel when the watch is
vertical. The amount of friction and thus the amplitude of the balance wheel
is much lower when the watch is vertical, so timekeeping tends to speed up
(each swing is completed in less time). Also, when you set the watch down
it is cooler than on your body and also the spring unwinds somewhat
overnight. All of these have an influence on timekeeping as well. That is
why a mechanical watch can never approach the theoretical timekeeping of a
quartz .

"Don Awalt" <donawalt@xxxxxxxxxxxxxxxxxxx> wrote in message
news:TdudnVEfouWxyTDeRVn-ug@xxxxxxxxxxxxxx
> Hi all,
>
> I received a Tissot LeLocle Mechanical-Automatic watch as a gift. It's a
> very nice watch, I love it. My understanding is that it should have the
> accuracy of a quartz watch, but it has one odd behavior I have not seen
> with quartz.
>
> I have made it a point to wear the watch all day for about 4 days, to
> ensure it's wound. I set it and two other cheaper quartz watches to the
> same time, and during the time I wear the watch (from about 5:30 am to
> 10:30 pm) the Tissot does not gain/lose any perceptible time - < 1 sec for
> sure.
>
> Overnight however, it picks up anywhere from 3 to 5 seconds - evey night!
> And it's fast, not slow, which tells me it's probably not due to a problem
> with not being wound. That's 1/2 sec to almost a full second an hour
> overnight! Seems something is wrong?
>
> Is this something that settles in, or is it the way I am storing the watch
> (ie does it need to be set down in a particular position?) Or is there
> something wrong with the watch? This could easily be inaccurate fast by 2
> minutes a month if I just set it and left it. I have never had a cheaper
> quartz watch be that inaccurate.
>
> Thanks for your help - I love the watch but I can't believe that it gains
> so much time overnight.
>
> Don
>


.

Relevant Pages

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