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CAUTION
WATER RESISTANCE
・ Check the dial or case back of your watch for the water resistant quality, and then see the
table below.
・ Do not turn or pull out the crown when the watch is wet, as water may get inside the watch.
90
●MAGNETIC RESISTANCE
Grand Seiko Spring Drive conforms to the Magnetic Resistance Standard ※ of JIS Class 1.
The watch has magnetic resistance to maintain performance in most cases even where it is
brought close to (at least 5cm spaced from) equipment generating a magnetic field in normal
life. However, the movement part is magnetized when it encounters a strong magnetic field,
thereby accuracy may go out of order. Pay attention so as not to bring the instrument close
to equipment (health appliances, speakers, and mobile phones using a magnet) generating a
strong magnetic field within 5cm.
Classification of
Certified level
Indication of
JIS antimagnetic
of magnetic re-
antimagnetism on
92
watches
sistance
the case back
Class 1
4800A/m
If the accuracy exceeds the accuracy target range ( ± 15 seconds/month) during normal
usage due to magnetization, removal of magnetism and accuracy readjustment works are
charged regardless of the guarantee period.
Antimagnetic quality
The watch has magnetic resistance to
maintain performance in most cases
where it is brought close to (at least
5cm spaced from) equipment generating
a magnetic field in normal life.
The case back shows the performance, caliber/case number of your watch
<Regular case back>
Water resis-
tance
refer to Page
90.
Magnetic resis-
tance refer
to Page 92.
Caliber and Case
Number
The number to
identify the type
of your watch
※ The above figures are examples. Both of them may be different from the figure on
the case back of your watch.
●Magnetized items that may affect watches
Examples of common items that generate a magnetic field
Magnetic clips
Magnetic accessories
Magnetic health equipment (such
Magnetic door seal of
as magnetic plasters, magnetic pil-
refrigerator or furniture
lows, magnetic back belts etc.)
<See-through case back>
91
93
Speaker of audio instruments, radios, ear-
phones, mobile phone
Magnetic buckle of handbags or purses
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