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About mechanical watches
The accuracy of a mechanical watch in this instruction manual is static accuracy at
normal temperatures.
Accuracy of a mechanical watch may not be kept within a normal accuracy range
due to using conditions such as below.
Winding amount of the
A mechanical watch keeps its accuracy best when its
mainspring is sufficiently wound.
mainspring
Accuracy of a mechanical watch varies affected by gravity.
The accuracy varies as the result that the watch may take
Posture of the watch
various attitude while worn and gravitate to a different
direction every moment.
Metal parts are used for the part for keeping accuracy in
a mechanical watch. The accuracy varies affected by their
thermal expansion and contraction and change of physical
Temperature
characteristics of a spring owing to temperature variation.
*It is recommended to use this watch within +8 °C - +38 °C
(46 °F - +100 °F).
Metal parts are used in a mechanical watch. Magnetism
affects them and accuracy of the watch in consequence. Do
Magnetism
not bring it close to things which have or generate strong
magnetism.
Strong shocks and continuous vibration may also affect the
Impact and others
accuracy.
Taking care of magnetism of your surroundings
The most important part in a mechanical watch for its time accuracy is "balance".
The balance has a very small and thin spring (hairspring). It oscillates in a certain
period of time to keep accuracy of a mechanical watch.
Oscillation of the hairspring
Oscillation of the hairspring may fluctuate and total movement of a mechanical
watch is consequently affected much if a thing with strong magnetism exists its
nearby.
Everyday items with strong magnetism
Notebook computer, smartphone, tablet, tablet cover, speaker, earphones,
headphones, clasps of handbags, magnets used in the latches of refrigerator doors,
magnetic health devices, etc.
Keep the devices and equipment at least 5 cm away from the watch.
Caring of a mechanical watch
Mechanical watches may become inaccurate due to insufficient lubrication or worn
parts. Have the watch disassembled and cleaned (overhaul) every 2-3 years (charge
basis). It may be difficult to restore the watch from degradation after long-term use
to its initial performance even after repairs.
Troubleshooting
Movement of a hand seems strange
Symptom
Remedies
The mainspring may not be wound enough. Wind up the
No hands move.
mainspring manually.
The watch cannot be operated
Symptom
Remedies
The crown and
Screw down crown and buttons must be unlocked before
buttons do not
operation.
work.
Mainspring
Symptom
Remedies
The mainspring is
not wound though
If you do not move your arms much in your daily life,
even after wearing
for example you spend a lot of time sat at a desk, the
the watch for a
mainspring may not be wound sufficiently. In such cases,
certain period of
wind the mainspring manually.
time.
Calendar
Symptom
Remedies
AM/PM setting is incorrect.
The calendar
Set the calender to the previous of the target date
changes in the
following the steps of calendar adjustment and set AM/
daytime.
PM and date correctly in the course of time setting.
On this watch, you should not adjust the calendar in a
The calendar does
certain period of time. Adjusting the calendar in the
not change.
period of time on the watch may cause incorrect change
of indication.
0210 instruction manual
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