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Peter, what type of watch is this?

Are your activity patterns different in the two seasons?

And, do you take your watch off and place it on the nightstand at night?

Either would account for some difference, the latter only if is mechanical.

Many years ago, when quartz was still something new, Bulova was looking at
powering their Asccutrons (for a while the most accurate non-atomic timekeepers
on the planet) from some type of "heat pile", literally using the heat from the
wrist to power them. AFAIK no one ever has done this commercially, but the new
Casio watches that use a traditional self-winder mass to power a dynamo and a
quartz stepper motor, and the Seiko's that use a photosensitive face (dial) to
power the same movement, absolutely amaze me. Since the stepper motor design
really does not require lubrication, and there is never a need for opening the
case, thus never a need for cleaning, these watches can literally keep time for
a lifetime with no further attention. Supposedly within 15-30 seconds per month
before personal regulation. (Adjustment to compensate for the user's habits and
lifestyle.)

(I may have reversed the Seiko/Casio technologies here, not having either I tend
to simply lump them both together as "incredible".)

----- Original Message -----
From: "Peter Fogg" 
To: 
Sent: Monday, May 15, 2006 10:56 PM
Subject: Re: mechanical chronometers


> > Red wrote:
> >  I have over the years sometimes marked down the rates for various
> > watches and,  aside from the battery powered ones shifting as the
> > battery was allowed  to age, I can't really say I've noticed much
> > fluctuation in them.
>
> You're lucky. I notice a consistent shift between summer and winter.
>

   

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