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Seiko 9S86 Manual

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INTRODUCTION -About mechanical watch-
Thank you very much for purchasing the Grand Seiko mechanical watch.
Take hold of your watch softly.
Hear the watch ticking,
tick tock, tick tock, tick tock,
soft and faint, a dignified sound can be heard.
The sound can be called
the crystal of the craftsmen’s spirit and skill.
Handpicked parts assembled one by one,
carefully, with craftsmanship,
giving life to a mechanical watch.
This is proven by the sound.
Talking about accuracy,
mechanical watches cannot be compared to
quartz watches, that is for certain.
However, the accuracy of a mechanical watch
is pursued by human hands.
Full of spirit and know-how of craftsmen.
A mechanical watch - complicated, sensitive,
and having a human touch.
We would like to let all of you know
the charm of a mechanical watch, which has no bounds.
So we made this handbook, mainly detailing the accuracy.
Wishing you will have a nice time
with your Grand Seiko for a long, long time.
2INTRODUCTION -About mechanical watch-
Quartz watches and mechanical watches - what
is the difference?
We will explain by example
Quartz watches that you have come to be
familiar with.
These are just like airplanes, controlled by
computers.
A battery, IC, and crystal make quartz
watches work accurately, electrically.
Some loss or gain may occur while the watch
is worn.
However, this will be too small to notice in your
daily life.
If a quartz watch resembles an airplane, a
mechanical watch is like a bicycle.
All watch parts work together mechanically to
make it tick.
Thus, a mechanical watch is easily affected
by the outside environment.
If it is hot, the watch tends to lose time. When
power driving the watch becomes short (when
the amount the spring is wound is short),
accuracy becomes unstable.
If the resting position of the watch is changed,
accuracy is also affected.
The rate of loss/gain could be significant that
you will notice in your daily life.
The accuracy is shown by the daily rate
The measured loss/gain of the watch per day
This is called the daily rate.
The accuracy of a mechanical watch is usually shown in
this daily rate.
The accuracy of a mechanical watch changes delicately
day by day,
depending on the condition in which the watch is used or
the outside environment.
Thus,
By only observing loss/gain in one day, you cannot judge
how accurate the watch works.
If you check the average of the daily loss/gain rate, you
can judge the accuracy of the watch.
In the case of quartz watches, the accuracy is usually
shown by the monthly/yearly rate.
Total losses/gains for a month/year are called the loss/
gain rate of quartz watches.
3
INTRODUCTION -About mechanical watch-Characteristics of a mechanical watch
English
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