78
79
※ The above figures are examples. Both of them may be different from the figure on the case back of your watch.
Caliber Number
The number to identify
the type of your watch
Water
resistance
Magnetic
resistance
Refer to pages
80 and 81.
●
Performance and caliber of your watch
The case back shows the caliber and performance of your watch
● LumiBrite
LumiBrite is a luminous paint that is completely harmless to human beings and natural environment, containing no
noxious materials such as radioactive substance. LumiBrite is a newly-developed luminous paint that absorbs the
light energy of the sunlight and lighting apparatus in a short time and stores it to emit light in the dark.
Please note, however, that, as LumiBrite emits the light it stores, the luminance level of the light decreases
gradually over time. The duration of the emitted light may also differ slightly depending on such factors as the
brightness of the place where the watch is exposed to light and the distance from the light source to the watch.
Environment
Indication of brightness （luminance）
Sunlight
Fine weather
100,000 lux
Cloudy weather 10,000 lux
Indoor
（Window-side during daytime）
Fine weather
more than 3,000 lux
Cloudy weather 1,000 to 3,000 lux
Rainy weather less than 1,000 lux
Lighting apparatus
（40-watt daylight fluorescent light）
1m
1,000 lux
3m
500 lux （average room luminance）
4m
250 lux
＜Reference data on the luminance＞
80
81
・ Examples of common items that generate a magnetic field
● Magnetized items that may affect watches
・ Speaker of audio instruments, radios, ear-
phones, or mobile phone etc.
・ Magnetic clips
・ Magnetic accessories
・ Magnetic health equipments （such as magnetic
plasters, magnetic pillows, magnetic back belts etc.）
・ Magnetic door seal of
refrigerator or furniture
・ Magnetic buckle of handbags or purses
・ Grand Seiko Diver’s watches conform 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 parts are magnetized when they encounter a strong
magnetic field, thereby accuracy may go out of order. Pay attention so as not to bring the
watch close to equipments generating a strong magnetic field within 5cm.
● Magnetic resistance （affect of magnetic field）
Classification of JIS
antimagnetic watches
Certified level of
magnetic resistance
Indication of antimagnetism
（on the case back）
Antimagnetic quality
Class 1
4800A/m
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.
・ 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.
Caution
Keep the watch more than 5 cm away from magnetized products.
82
83
Notes on the length
of the band
Notes on skin
irritation and
allergy
Skin irritation caused by a band has various reasons such as allergy
to metals or leathers, or skin reactions against friction on dust or
the band itself.
Adjust the band with a little clearance with your wrist to
ensure proper airflow. Make a room for one finger around
your wrist when you wear the watch.
● Band
The band touches the skin directly and becomes dirty with sweat or dust.
Therefore, lack of care may accelerate deterioration of the band or cause skin irritation
or stain on the sleeve edge. The watch requires a lot of attention for long usage.
Metallic band
・ Moisture, sweat or soil will cause rust even on a stainless steel band if they are
left for a long time.
・ Lack of care may cause a yellowish or gold stain on the lower sleeve edge of shirts.
・ Wipe off moisture, sweat or soil with a soft cloth as soon as possible
・ To clean the soil around the joint gaps of the band, wipe it out in water and then
brush it off with a soft toothbrush.
・ Even if the band is a titanium band, stainless steel with a superior strength may be
used for the pins and rust may occur on the stainless pins.
・ If rust becomes severe, the pins may stick out or come out of the band, causing the
watch to fall off. Or the clasp may become difficult to be unfastned.
・ Should the pins stick out of the band, it may cause injury. Immediately stop using
the watch and request repair.
Polyurethane band
・ A polyurethane band is susceptible to discoloration from light, and may be
deteriorated by solvent or atmospheric humidity.
・ Especially a translucent, white, or pale colored band easily adsorbs other colors,
resulting in color smears or discoloration.
・ Wash out dirt in water and clean it off with a dry cloth.
（Protect the watch body from water splashes by wrapping it up in plastic wrap etc.）
When the band becomes less flexible or cracked, replace the band with a new one.
84
85
● Replacement parts
・ SEIKO makes it policy to usually keep a stock of spare parts for GRAND
SEIKO watches for 10 years. In principle, your watch can be reconditioned
within this period if used normally. （Replacement parts are those which
are essential to maintaining the functional integrity of the watch.）
・ The number of years that a watch is considered repairable may vary great-
ly depending on the conditions under which it was used, and normal ac-
curacy may not be achieved in some cases. We recommend, therefore, that
you consult the retailer from whom the watch was purchased when having
them repair your watch.
・ The case, dial, hands, glass and bracelet, or parts thereof may be replaced
with substitutes if the originals are not available.
・ If you have any questions, please contact SEIKO CUSTOMER SERVICE
CENTER.
■ AFTER-SALE SERVICES
・ Your Grand Seiko watch was strictly checked and completely adjusted at the factory
to ensure its high accuracy. However, if your watch gets out of order with the cor-
rect way of use as described in this instruction booklet within the guarantee period,
take your watch to the retailer from whom your watch was purchased together with
the certificate of guarantee. Repair and adjustment will be made without charge.
・ The guarantee period is one year from the date of purchase. For the movement only,
this guarantee period is extended to two years from the date of purchase. More de-
tailed guarantee coverage is provided in the certificate of guarantee.
・ For repair services after the guarantee period has expired or for any other in-
formation regarding the Grand Seiko, please contact the retailer from whom your
watch was purchased or SEIKO CUSTOMER SERVICE CENTER.
