Introduction -About Mechanical Watch - Seiko Cal. 9S85 Operating Instructions Manual

■INTRODUCTION
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
Seiko Watch Corporation
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-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
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
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
Characteristics of a mechanical watch
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