Affected by nearby magnetism, a watch may temporarily gain or lose time or stop operating.
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Indication on the case back |
Conditions of use |
Certified level |
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No indication For diver’s model |
Keep the watch more than 5 cm away from magnetic products.
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4,800 A/m |
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Keep the watch more than 1 cm away from magnetic products.
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16,000 A/m |
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MAGNETIC RESISTANT 40000A/m |
The watch can maintain its performance in most cases where it is brought close to (at least 1 cm spaced from) magnetic products not only in normal daily life circumstances but also in a special work environment. |
40,000 A/m |
A/m (ampere meter) is the international unit (SI unit) for indicating the magnetic field.
If the watch becomes magnetized and its accuracy deteriorates to an extent exceeding the specified rate under normal use, the watch may need to be demagnetized. In this case, you will be charged for demagnetization and accuracy readjustment even if it happens within the guarantee period.
Examples of common magnetic products that may affect watches
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Smartphone, cellular phone, tablet terminal |
AC adapter |
Bag |
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AC-powered shaver |
Magnetic cooking device |
Portable radio |
Magnetic necklace |
Magnetic health pillow |
The reason why analogue quartz watch is affected by magnetism
It is because the built-in motor of the watch, which, harnesses magnetic power and external strong magnetism, affect each other to stop the motor or suppresses the turn of the motor.