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Seiko 6R15 Manual

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ACCURACY OF MECHANICAL WATCHES
● The accuracy of mechanical watches is indicated by the daily rates of one week
or so.
● The accuracy of mechanical watches may not fall within the specified range of
time accuracy because of loss/gain changes due to the conditions of use, such as
the length of time during which the watch is worn on the wrist, arm movement,
whether the mainspring is wound up fully or not, etc.
● The key components in mechanical watches are made of metals which expand
or contract depending on temperatures due to metal properties. This exerts an
effect on the accuracy of the watches. Mechanical watches tend to lose time at
high temperatures while they tend to gain time at low temperatures.
● In order to improve accuracy, it is important to regularly supply energy to the
balance that controls the speed of the gears. The driving force of the mainspring
that powers mechanical watches varies between when it is fully wound and im-
mediately before it is unwound. As the mainspring unwinds, the force weakens.
Relatively steady accuracy can be obtained by wearing the watch on the wrist fre-
quently for the self-winding type and winding up the mainspring fully everyday
at a fixed time to move it regularly for the wind-up mechanical type.
Problem
The watch gains/loses
temporarily.
The date change at 12
o’clock noon.
The power supplied by the
mainspring has been
consumed.
The watch is worn on your
wrist only for a short period
of time, or the amount of
arm movement is small.
The watch has been left in
extremely high or low
temperatures for a long time.
The watch was brought into
close contact with a
magnetic object.
You dropped the watch, hit it against
a hard surface or wore it while
playing active sports. The watch was
exposed to strong vibrations.
Normal accuracy will resume when the
watch returns to normal temperature.
Normal accuracy will resume when the watch is kept away from
close contact with the magnetic source. If this condition persists,
consult the retailer from whom the watch was purchased.
Normal accuracy will not resume.
Consult the retailer from whom the
watch was purchased.
Consult the retailer from whom the
watch was purchased.
Advance the hands by 12 hours.
Consult the retailer from whom the
watch was purchased.
AM/PM is not properly set.
Water got inside the watch
due to the deterioration of
the gasket, etc.
The watch has not been
overhauled for more than 3 years.
Possible causes
The watch stops
operating.
Even though you wear the
watch every day, it soon
stops operating.
The glass is blurred and
the blur persists for a
long time.
*For the solution of troubles other than listed above, contact the retailer from whom the watch was purchased.
Solutions
Turn the crown or swing the watch to wind it up. The
watch will start operating. If the watch does not start,
consult the retailer from whom the watch was purchased.
Wear the watch for an extended period of
time, or when taking off the watch, turn the
crown to wind the mainspring.
TROUBLESHOOTING
… 10


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