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One problem is that you never know for sure
when you buy:-)
My first Casio watch ($25) run 12 years on the
original battery, to 10 seconds per year accuracy.
I used it until the plastic case was brocken.
The second casio watch (of exactly the same type)
runs much worse.

Alex

On Tue, 23 Oct 2007, Dan Allen wrote:

>
> On 23 Oct 2007, at 10:47 AM, Gary LaPook wrote:
>
> > I bought a Torgoen dual time zone watch for about $175.00 on
> > October 12, 2004, three years ago, and, so far, it has gained only
> > 14 seconds, and the rate has been very consistent.
>
> That is almost too good to be true!
>
> Do you have a model number for this watch?  Do you know if it is a
> twin-quartz, or an oversampled quartz movement?  Typical quartz
> watches run 15 seconds a month, and there are only a very, very few
> that have these additional technologies which generally improve
> accuracy to around 15 seconds a year.
>
> I have, for example, a certain Seiko SLL033 with the oversampled
> 176KHz movement good to around 20 seconds a year.  I also have an
> Omega 1552.30 good to around 15 seconds.  These are hard watches to
> find, and in addition, they often change movements year to year so
> you have to really check things out to ensure that you can find a
> truly accurate watch.
>
> I have a Citizen solar powered WR 200 Perpetual Calendar which makes
> no claims for high accuracy and yet it has given almost the same
> accuracy.  Quartz watches are affected by temperatures and sometimes
> if you have a watch at a constant temperature the randomness cancels
> and you get high accuracy, but it is not guaranteed across different
> examples of the same watch.
>
> Dan
>
>
> >
>


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