Seiko 9R66 User manual

本 社 〒 105-8467 東京都港区芝浦 1 − 2 − 1
BS9R66G-0711
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  
       
        
          
      
          
          
      
    
          
          
  
目 次
      
       
 
     
    
 
       
     
       
      
       
       
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■製品の特長
スプリングドライブとはセイコー独自の機構で、ぜんまいが巻き解ける力を唯
一の動力源としながらも、クオーツ時計と同等の高精度を実現した機構です。
ぜんまいを充分に巻き上げた状態から、約 72 時間（約 3 日間）動き続けます。
ぜんまいの巻き上げ状態がわかるパワーリザーブ表示付きです。秒針は完全に
滑らかなスイープ運針で動きます。
巻き上げ方式は自動巻ですが、手巻機構も併せて備えていますので、始動時
の巻き上げに便利です。
グランドセイコースプリングドライブ GMT は、24 時針付きのキャリバー 9R66
を搭載しています。時針は単独で修正できますので、たとえば海外旅行中に時
針を現地の時刻（ローカルタイム）に合わせておきながら 24 時針で日本時間（ホー
ムタイム）を表示するデュアルタイムとして使用できます。
スプリングドライブはぜんまいの力で動きます。パワーリザーブ表示を確認しながら、
充分に巻き上げてご使用ください。
⇒ ■パワーリザーブ表示について Ｐ. １3 参照
このたびはグランドセイコーをお買い上げいただき、ありがとう
ございました。SEIKO では、時計づくり 100 有余年の伝統と、
世界に誇る先進技術のすべてを注ぎ、製造・検査を実施して
おります。グランドセイコーの優れた性能を保つために、この
取扱説明書をよくお読みの上、末長くご愛用くださいますよう
お願い申し上げます。
この取扱説明書はお手もとに保管していただき、必要に応じて
ご覧ください。 注意
※スプリングドライブ機構の詳細については、別冊の「スプリングドライブ・ハンドブック」を
お読みください。

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How to set the calendar …………………………………………………… 61
How to use the 24-hour hand …………………………………………… 64
■TIME DIFFERENCE ADJUSTMENT FUNCTION ………………… 65
How to use the time di󱐯erence adjustment function …………………… 65
Selectable display mode …………………………………………………… 68
How to use the rotating bezel …………………………………………… 69
List of time zone di󱐯erences in major regions of the world ………… 70
■SPECIFICATIONS ……………………………………………………… 72
■REMARKS ON AFTER-SALES SERVICING …………………………74
■REMARKS ON REPLACEMENT PARTS …………………………… 75
■TO PRESERVE THE QUALITY OF YOUR WATCH ……………… 76
■TROUBLESHOOTING …………………………………………………… 84
CONTENTS
■CHARACTERISTICS …………………………………………………… 47
■NAMES OF THE PARTS AND THEIR FUNCTION ………………… 48
■SCREW LOCK TYPE CROWN ………………………………………… 51
How to use the screw lock type crown …………………………………… 52
■HOW TO WIND THE MAINSPRING …………………………………… 53
Guide for winding state of the mainspring ……………………………… 53
How to manually wind the mainspring by turning the crown …………… 54
■POWER RESERVE INDICATOR ……………………………………… 55
How to read the power reserve indicator ………………………………… 56
■HOW TO SET THE TIME AND CALENDAR ………………………… 57
How to set the time ………………………………………………………… 57
Tips for more accurate time setting ……………………………………… 60
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■CHARACTERISTICS
Spring Drive, the unique mechanism made available only by SEIKO technology, ensures
quartz accuracy while using the mainspring as its sole power source.
The watch will work continuously for approximately 72 hours (three days) when the main-
spring is fully wound.
The watch features a power reserve indicator to show the winding state of the mainspring.
The sweep second hand works in a perfectly smooth movement.
This is a self-winding watch equipped with a manual winding mechanism. When rst using
the watch, manual winding is convenient.
Grand Seiko SPRING DRIVE GMT, equipped with the caliber 9R66 movement with the
24-hour hand. The hour hand can be independently adjusted, o󱐯ering some types of usage
of the hour display, for instance, by setting the 24-hour hand to Japan time, and even if you
set the hour hand to display the time of the place you are staying (local time) while traveling
abroad, you can easily check the time in Japan (home time).
Spring Drive works by the power provided by the mainspring. Remember to check the power re-
serve indicator and keep the mainspring of the watch su󱐰ciently wound while using the watch.
Refer to "POWER RESERVE INDICATOR" on page 55.
You are now the proud owner of a Grand Seiko watch.
Grand Seiko watches are designed and manufactured to op-
erate with extremely high accuracy by taking advantage of
SEIKO's more than 100 years of experience in watchmaking
and the advanced technology that SEIKO can boast to the
world.
To preserve the highest quality of your Grand Seiko watch,
please read the instructions in this booklet carefully for its
proper use and care, and keep this booklet for ready reference.
※ For the details of the Spring Drive mechanism, refer to the separate volume "Spring Drive Handbook".
CAUTION
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GMT
Hourhand
Minutehand
Crown
Rotatingbezel
（with24-hourindicators）
Outerframeofthedial
（with24-hourindicators）
Second
hand
Date
24-hourhand
Powerreserve
indicator
Hourhand
Minutehand
Crown
Outerframeofthedial
（with24-hourindicators）
Second
hand
Date
24-hourhand
Powerreserve
indicator
■NAMES OF THE PARTS AND THEIR FUNCTION
●Basic mechanism
※ The orientation and design of the display may vary depending on the model.
※ Some models may have screw lock type crown.
Refer to "SCREW LOCK TYPE CROWN" on page 51.
●Basic mechanism
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●The mechanism of the crown
Screw lock type crown
Before operating the screw lock type crown, it is necessary to unlock it.
In order to prevent any operational errors, once you have nished operating the crown, make
sure to relock it.
Refer to "SCREW LOCK TYPE CROWN" on the following page 51.
L ０ １ ２
L: Screw lock type crown is at the locked position.
0: Screw lock type crown is at the unlocked position: the
mainspring can be manually wound.
1: Screw lock type crown is positioned for calendar set-
ting. (time di󱐯erence adjustment.)
2: Screw lock type crown is positioned for time setting.
■SCREW LOCK TYPE CROWN
The watch features a screw-lock mechanism that can securely lock the crown to pre-
vent any operational errors when they are not being operated.
Screw lock type crown is locked. Screw lock type crown is unlocked.
※ Once the crown is unlocked, you can pull it out.
●Screw lock type crown
It is necessary to unlock the screw lock type crown before operating it.
Once you have nished operating the crown, make sure to relock it.

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●How to use the screw lock type crown
How to unlock the screw lock type crown How to lock the screw lock type crown
Turn the crown counterclockwise
(downward) to unscrew it.
Now the crown can be operated.
To loosen
Turn the crown clockwise (upward)
while gently pressing it in toward
the watch body until it stops.
Turn the crown while pressing it in.
When locking the crown, turn it slowly with care, ensuring that the
screw is properly engaged. Be careful not to forcibly push it in, as doing so
may damage the screw hole.
CAUTION
■HOW TO WIND THE MAINSPRING
This watch is a self-winding watch equipped with a manual winding mechanism. When
the watch is worn on the wrist, the motion of the wearer's arm winds the mainspring
of the watch.
When first using a stopped watch, it is recommended that you manually wind the
mainspring by turning the crown.
※ The watch employs a device to prevent overwinding of the mainspring. Once the mainspring is fully
wound, the mainspring slips inside, disengaging the winding mechanism. When this happens, you can
still turn the crown without damaging the watch, however, please refrain from excessive operation of the
mainspring.
※ Under a low-temperature condition (below 0℃), always keep at least one-sixth of the watch power shown
by the power reserve indicator.
●Guide for winding state of the mainspring
Self-winding:：
The mainspring of the watch is designed to be fully wound when it is worn for twelve hours per day
for three to ve consecutive days.
Manual winding:
Five full rotations of the crown will provide the power to run the watch for approximately ten
hours.
Observe the power reserve indicator to check the level of the remaining power.
Refer to "POWER RESERVE INDICATOR" on page 55.
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●How to manually wind the mainspring by turning the crown
In order to set the time and calendar after winding
the mainspring manually, do not relock the crown but
continue the procedures.
※ Refer to "HOW TO SET THE TIME AND CALENDAR" on page 57.
1. Unlock the crown.
2. Slowly turn the crown clockwise (upward) to wind the mainspring with
extra care not to press it in. Wind the mainspring until the power re-
serve indicator shows a full-wound state. The second hand starts moving.
3. Once you nish winding the mainspring,
make sure you relock the crown.
※ Refer to "How to use the screw lock type crown" on page 52.
※ Refer to "How to read the power reserve indicator" on page 56.
■POWER RESERVE INDICATOR
Before removing the watch from your wrist,
observe the power reserve indicator to
check if the watch has stored enough power
to keep running until the next time you wear
it. If necessary, wind the mainspring. (To
prevent the watch from stopping, wind the
mainspring to store the excess power that
will allow the watch to run for extra time.)
※ The continuous operable time of the watch may vary depending on actual use conditions, such as
the number of hours you wear the watch or the extent of your movement while wearing it.
※ In a case where you wear the watch for a short period of time, observe the power reserve indica-
tor to check the level of the remaining power. If necessary, manually wind the mainspring.
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GMT
Power reserve indicator
The power reserve indicator lets you know the winding state of the main-
spring.
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GMT
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Power
Reserve
Indicator
Winding
state
of the
mainspring
Fully wound Half wound Unwound
Number
of hours
the watch
can run
Approximately 72
hours (3 days)
Approximately 36
hours (1.5 days)
The watch either
stops or is running
down.
※ The watch employs a device to prevent overwinding of the mainspring. Once the mainspring is fully
wound, the mainspring slips inside, disengaging the winding mechanism. When this happens, you can
still turn the crown without damaging the watch, however, please refrain from excessive operation of the
mainspring.
※ The orientation and design of the display may vary depending on the model.
●How to read the power reserve indicator ■HOW TO SET THE TIME AND CALENDAR
To set the time and calendar, set the 24-hour hand and minute hand rst,
and then set the hour hand and calendar.
●How to set the time
1. Make sure that the mainspring is su󱐰ciently wound and the watch is working.
※ When setting the date and time, ensure that the watch is working.
3. Pull out the crown to the second click
when the second hand is pointing at
the " 0 " second position. The small
second hand will stop on the spot.
2. Unlock the crown.
Refer to "How to use the screw lock type
crown" on page 52.
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GMT
Second hand is pointing at
the " 0 " second position.
Pull out the
crown to the
second click.
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4. Turn the crown to rotate the 24-hour
hand and minute hand clockwise and set
them to the current time. While doing
so, set the minute hand a few minutes
behind the correct time, and then slowly
advance it to the desired time.
※ Only the 24-hour and minute hands are to be set rst.
Even if the hour hand is indicating incorrect time, or the
date may be altered depending on the position of the hour
hand, it is not necessary to make an adjustment at this
stage.
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GMT
Pull the crown
out to the rst
click.
5. Push the crown back in simultaneously
with the time signal.
※ The setting of the 24-hour,
minute and second hands to
the current time is now
completed.
Push the crown back in simul-
taneously with the time signal.
6. To move on to the hour hand and cal-
endar setting, pull the crown out to
the rst click.
Set the
24-hour
hand and
minute hand
by rotating
them clock-
wise.
8. Pu sh the crown back in to complete t he time s etting.
Relock the crown.
Refer to "How to use the screw lock type crown" on page 52.
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GMT
7. Turn the crown to set the hour hand.
While turning the crown, the moment the
date changes is midnight. When setting
the hour hand, be sure that AM/PM is set
correctly.
Adjust the calendar also at this point
if necessary.
※ The crown can be turned in either direction
to adjust the date, however, it is recommend-
ed to turn the crown in the direction which
enables you to set the date with a smaller
adjustment.
※ Turn the crown slowly, checking that the
hour hand moves in one-hour increments.
※ When adjusting the hour hand, the other
hands may move slightly. However, this is not
a malfunction.

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※ The crown can be turned in either direction to adjust the date, however, it is recommended to turn the crown in the
direction which enables you to set the date with a smaller adjustment.
※ Turn the crown slowly, checking that the hour hand moves in one-hour increments.
※ While turning the crown, the moment the date changes is midnight.
※ When adjusting the hour hand, the other hands may move slightly. However, this is not a malfunction.
4. Turn the crown to set the hour hand to indicate the time of the place where you are
staying. Make sure that AM/PM is correctly set.
※ The calendar is designed to work in conjunction with the movement of the hour hand,
therefore, incorrect setting of AM/PM will cause the date to change at noon.
Refer to "List of time zone di󱐯erences in major regions of the world" on page 70.
Turning the
crown clockwise
(upward): The
hour hand is set
back one hour.
Turning the
crown counter-
clockwise (down-
ward): The hour
hand is advanced
one hour.
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GMT
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5. Upon completion of setting, make sure that the time indicated is correct, and then
push the crown back in. The setting procedure is now completed. Relock the crown.
Refer to "How to use the screw lock type crown" on page 52.
If you set the time during any time between 9:00 P.M. and 1:00 A.M., temporarily set the hour
hand back to 8:00 P.M., and then set the time.
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●How to use the 24-hour hand
This watch has two di󱐯erent types of 24-hour hand usage.
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<Type 1>
24-hour hand as an AM/PM indicator
Simply using the 24-hour hand to show the
24-hour time as an AM/PM indicator.
(This is the standard usage type for the
24-hour hand.)
<Type 2>
24-hour hand as a dual time indicator
Using the time di󱐯erence adjustment function, set the 24-hour
hand to indicate a time di󱐯erent from the time that the hour and
minute hand indicate, which is of a place in a di󱐯erent time zone
area with at least one hour of time di󱐯erence from where you are.
Refer to "How to use the time di󱐯erence adjustment function"
on page 65.
Both the hour
hand and the
24-hour hand are
indicating the
Japan time 10:00
A.M.
Hour hand: Japan
time 10:00 A.M
24-hour hand: New
York time 8:00
PM
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■TIME DIFFERENCE ADJUSTMENT FUNCTION
For example, while traveling abroad and staying in a place with a di󱐯erent time from where you
live, you can conveniently set the watch to indicate the local time in the di󱐯erent time zone area
without stopping the watch.
The hour hand indicates the time of the place where you currently are, while the 24-hour hand in-
dicates the time of the place of origin.
The calendar works in conjunction with the movement of the hour hand. If the time di󱐯erence is
correctly adjusted, the watch displays the correct date of the place where you are staying.
3. Pull out the crown to the rst click.
Pull out the crown to
the rst click.
2. Unlock the crown.
Refer to "How to use the screw lock type
crown" on page 52.
●How to use the time difference adjustment function
1. Make sure that the mainspring is su󱐰ciently wound and the watch is working.
※ When setting the hour hand to use the time di󱐯erence
adjustment function, ensure that the watch is working.
62
63
4. Each time the hour hand makes two full rotations by turning the crown, the date
is adjusted one day. While turning the crown, the moment the date changes is mid-
night. When setting the hour hand, be sure that AM/PM is set correctly.
※ The crown can be turned in either direction to
adjust the date, however, it is recommended to
turn the crown in the direction which enables you
to set the date with a smaller adjustment.
※ Turn the crown slowly.
※ When adjusting the hour hand, the other hands
may move slightly. However, this is not a malfunc-
tion.
Turning the crown clockwise (upward): Each
time the hour hand makes two full rotations, the
date is set back one day.
Turning the crown counterclockwise (downward):
Each time the hour hand makes two full rota-
tions, the date is advanced one day.
Before
date
adjustment
5. Upon completion of setting, make sure that the time indicated is correct,
and then push the crown back in. The calendar setting is now completed.
Relock the crown.
Refer to "How to use the screw lock type crown" on page 52.
※ The calendar is designed to work in conjunction with the movement of the hour hand, therefore,
incorrect setting of AM/PM will cause the date to change at noon.
※ The crown can be turned in either direction to adjust the date, however, it is recommended to
turn the crown in the direction which enables you to set the date with a smaller adjustment.
※ Turn the crown slowly, checking that the hour hand moves in one-hour increments.
※ When adjusting the hour hand, the other hands may move slightly. However, this is not a mal-
function.
60
61
●Tips for more accurate time setting
Keep in mind the following points in order to set the time more accurately.
1. Before setting the time, wind the mainspring su󱐰ciently.
(Ensure that the power reserve indicator is showing a full-wound state.)
2. When starting to use a watch after it stops, wind the mainspring su󱐰-
ciently. To set the time after that, wait for approximately 30 seconds af-
ter the second hand starts to move, then pull the crown out to the second
click.
3. The second hand will stop moving while the crown is at the second click.
Do not stop the second hand movement for longer than 30 minutes. If the
stoppage of the small second hand movement exceeds 30 minutes, push the
crown back in, and wait for at least 30 seconds after the second hand re-
starts moving, and then continue the time setting.
4. To set the time during any time between 9:00 P.M. and 1:00 A.M., tempo-
rarily set the hour hand back to 8:00 P.M., and then set the time.
(This procedure is required to ensure the proper engagement of the calen-
dar driving wheel.)
●How to set the calendar
Two full rotations of the hour hand will change the date for one day.
The date advances one day by turning the hour hand two full rotations clockwise (for
24 hours), while the date is set back one day by turning the hour hand two full rota-
tions counterclockwise.
Manual date adjustment is required on the rst day after a month that has less than
31 days: February, April, June, September and November.
1. Make sure that the mainspring is su󱐰ciently wound and the watch is working.
※When setting the date and time, ensure that the watch is working.
3. Pull out the crown to the rst click.
Pull out the crown
to the rst click.
2. Unlock the crown.
Refer to "How to use the screw lock type
crown" on page 52.

68
69



●Selectable display mode
󱐯
󱐯󱐯


22
2
4
6
8
10
12
14
16
18
20
23
21
19
17
15
13
11
1
3
5
4
6
6
GMT
22
2
4
6
8
10
12
14
16
18
20
23
21
19
17
15
13
11
1
3
5
4
6
5
GMT



● How to use the rotating bezel

󱐯




󱯎 
󱯐 
        

󱯒 󱐯

󱐯



       

󱐯
󱐯
22
2
4
6
8
10
12
14
16
18
20
23
21
19
17
15
13
11
1
3
5
4
6
6
GMT
70
71
●List of time zone differences in major regions of the world
The time differences and use of daylight saving time in each region are subject to change according
to the governments of the respective countries or regions.
Refer to "How to use the time di󱐯erence adjustment function" on page 65.
Names of the cities Time difference from
Japan Time difference from UTC Other cities
Wellington★ + 3 hours + 12 hours Fiji islands, Auckland ★
Nouméa + 2 hours + 11 hours Solomon Islands
Sydney ★ + 1 hours + 10 hours Guam, Khabarovsk ★
Tokyo ± 0 + 9 hours Seoul, Pingyang
Hong Kong - 1 hour + 8 hours Manila, Beijing, Singapore
Bangkok - 2 hours + 7 hours Jakarta
Dacca - 3 hours + 6 hours
Karachi - 4 hours + 5 hours Tashkend ★
Dubai - 5 hours + 4 hours
Moscow ★ - 6 hours + 3 hours Mecca, Nairobi
Cairo ★ - 7 hours + 2 hours Athens ★, Istanbul ★
Regions marked with ★ use daylight saving time (as of January, 2007).
Names of the cities Time difference from
Japan Time difference from UTC Other cities
Paris★ - 8 hours + 1 hour Rome★, Amsterdam★
London ★ - 9 hours ± 0 Casablanca
Azores ★ - 10 hours - 1 hour
Rio de Janeiro ★ - 12hours - 3 hours
Caracas - 13 hours - 4 hours Santiago★
New York ★ - 14 hours - 5 hours Washington★, Montreal★
Chicago ★ - 15 hours - 6 hours Mexico City ★
Denver ★ - 16 hours - 7 hours Edmonton★
Los Angels ★ - 17 hours - 8 hours San Francisco ★
Anchorage★ - 18 hours - 9 hours
Honolulu - 19 hours - 10 hours
Midway Islands - 20 hours - 11 hours
There are time zone differences based on time offsets from Coordinated Universal Time (UTC), which has
been internationally adopted. The world is divided into 24 time zones, and neighboring time zones have a
one-hour time difference, so that they correspond to the rotation of the earth which makes one full rotation
in 24 hours (1 day). In some regions of the world, daylight saving time is individually observed.
Daylight saving time is a system that advances the official local time by one hour during the summer to take
advantage of longer daylight hours.
72
73
■SPECIFICATIONS
1. Features:…Hour, Minute and Second hands, Power Reserve Indicator and Date
2. Frequency of crystal oscillator:…32,768 Hz
3. Loss/gain (monthly average):… Within±15 seconds (equivalent to±1 second per day) (worn
on your wrist at a normal temperature range between 5℃
and 35℃ )
4. Operational temperature range: …−１０℃〜＋６０℃
Under a low-temperature condition (below 0 ℃ ), al-
ways keep at least one-sixth of the watch power shown
by the power reserve indicator.
5. Driving System:…Spring Drive (Self-winding type with manual winding function)
6. Hand movement:…Sweep second hand
7. Duration:… Approx. 72 hours (Approx. 3 days) (If the power reserve indicator shows the
power supplied by the mainspring is full before starting the watch.)
Depending on conditions of use, the continuous operable time may become
shorter than the above.
8. IC (Integrated Circuit):… Oscillator, frequency divider, and spring drive control circuit
(C-MOS-IC): 1 piece
9. Jewels:…30 jewels
※ The specifications are subject to change without prior notice due to product
74
75
■REMARKS ON AFTER-SALES SERVICING
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 correct way of use as described in this instruction booklet
within the guarantee period, take your watch to the dealer 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 move-
ment only, this guarantee period is extended to two years from the date of
purchase. More detailed guarantee coverage is provided in the certificate
of guarantee.
For repair services after the guarantee period has expired or for any other
information regarding the Grand Seiko, please contact the retailer from
whom your watch was purchased or the "CUSTOMER SERVICE DE-
PARTMENT" of SEIKO WATCH CORPORATION.
■REMARKS ON 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 greatly
depending on the conditions under which it was used, and normal accuracy
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 may be replaced with
substitutes if the originals are not available.
For any other information, contact the retailer from whom your watch was
purchased or the "CUSTOMER SERVICE DEPARTMENT" of SEIKO
WATCH CORPORATION.

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・ If the watch is left in a temperature below − 10℃ or above ＋ 60℃ for a
long time it may function improperly or stop operating.
・ Do not leave the watch in a place where it will be subjected to strong
magnetism (for example, near television sets, loudspeakers or magnetic
necklaces).
・ Do not leave the watch where there is strong vibration.
・ Do not leave the watch in a dusty place.
・ Do not expose the watch to gases or chemicals.
(Ex.: Organic solvents such as benzene and thinner, gasoline, nail polish,
cosmetic spray, detergent, adhesives, mercury, and iodine antiseptic solu-
tion.)
・ Do not leave the watch in close contact with hot spring water, or do not
keep it in a drawer having insecticides inside.
●Places to keep your watch
Inspection and adjustment by disassembly and cleaning (overhaul) of this
watch will be performed by SEIKO. When you take the watch to the re-
tailer from whom it was purchased, request that the watch be inspected and
overhauled by SEIKO.
We suggest that you have your watch checked by SEIKO every 3 to 4 years
for long-time use of your watch.
※ The movement of this watch has a structure that consistent pressure is applied on its pow-
er-transmitting wheels. To ensure these parts work together properly, periodic inspection
including cleaning of parts and movement, oiling, adjustment of accuracy, functional check
and replacement of worn parts is needed.
Inspection and adjustment by disassembly and cleaning (overhaul) within 3 to 4 years from the
date of purchase is highly recommended for long-time use of your watch.
Contact the retailer from whom the watch was purchased for inspection and adjustment by dis-
assembly and cleaning (overhaul) of your watch. Make sure that the gasket and push pin will be
also replaced with new ones.
・ For any questions or concerns, contact the "CUSTOMER SERVICE
DEPARTMENT" of SEIKO WATCH CORPORATION.
●Inspection and adjustment by disassembly and cleaning (overhaul)
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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.
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.
●Magnetic resistance
Classication of
JIS antimagnetic
watches
Certied level
of magnetic re-
sistance
Indication of
antimagnetism on
the case back
Antimagnetic quality
Class 1 4800A/m
The watch has magnetic resistance to
maintain perfor mance in most cases
where it is brought close to (at least
5cm spaced from) equipment generating
a magnetic eld in normal life.
Examples of common items that generate a magnetic field
●Magnetized items that may affect watches
Speaker of audio instruments, radios, ear-
phones, mobile phone
Magnetic clips Magnetic accessories
Magnetic health equipment (such
as magnetic plasters, magnetic pil-
lows, magnetic back belts etc.)
Magnetic door seal of
refrigerator or furniture
Magnetic buckle of handbags or purses
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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.
Designedand
manufacturedtowithstand
accidentalcontactwith
watersuchassplashes
andrain.
Suitableforshallow
divingwithoutaheavy
breathingapparatus.
Genuinediving
usingheliumgas.
Suitableforswimming,yachting
andotheraquaticsportsaswellas
forworkscloselyassociatedwith
watersuchaskitchenwork,
wateningandfishing.
Condition
ofuse
Degree
ofwater
resistance
Nowaterresistance
Waterresistance
（3bar）
Waterresistance
（5bar）
Waterresistance
（10bar）
Waterresistance
（20bar）
Indicationforwater
resistance
a: Indicationonthedia l
b:Indicationonthe
caseback
WATERRESISTor
WATERRESIST5BAR
Noindication,or
WATERRESIST20BAR
WATERRESIST20BAR
Noindication,or
WATERRESIST10BAR
WATERRESIST10BAR
Noindication
Noindication
Noindication
WATERRESIST
Noindication
× × ×××
◯ × ×××
◯ ◯ ×××
◯ ◯ ◯××
◯ ◯ ◯××
a
b
a
b
a
b
a
b
a
b
Genuine
divingusing
scuba.
CAUTION The case back shows the performance, caliber/case number of your watch
<Regular case back> <See-through case back>
※ The above figures are examples. Both of them may be different from the figure on
the case back of your watch.
Caliber and Case
Number
The number to
identify the type
of your watch
Water resis-
tance
refer to Page
77 and 78.
Magnetic resis-
tance refer to
Page 80 and 81.
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■TO PRESERVE THE QUALITY OF YOUR WATCH
CARE OF YOUR WATCH
The case and bracelet touch the skin directly just as underwear.
If they are left dirty, the edge of sleeve may be stained with rust of those who have a
delicate skin may have a rash.
After removing the watch from your wrist, wipe perspiration or moisture with a soft
cloth. This will prevent the watch from being soiled, adding to the life of the gasket.
Do not clean the watch with chemicals (especially with organic solvents such as
benzene, thinner, alcohol, detergent, etc.). Otherwise, the watch may be deteriorated.
LEATHER BAND
When removing moisture from a leather band, do not rub the band with the cloth as
they may discolor it or reduce its gloss. Be sure to blot up the moisture using a soft
dry cloth.
Please note that leather bands may become less durable when they are moistened.
METAL BRACELET
Clean the watch bracelet with a soft toothbrush dipped in water or soapy water.
CAUTION
Rash and allergy
Adjust the bracelet and band so that there will be a little clearance between the
bracelet or band and your wrist to avoid accumulation of perspiration.
If you are constitutionally predisposed to rash, the band may cause you to develop a
rash or an itch depending on your physical condition.
The possible cause of the rash are as follows:
1. Allergy to metals or leathers
2. Rust, dust or perspiration on the watch or band
If you develop any skin reactions, take off the watch and consult a doctor immediately.
CAUTION
Water resistance
・ If your watch is 3 bar water resistant, do not use it in water.
・ If your watch is 5 bar water resistant, do not use it in any type of diving including
skin diving.
・ If your watch is 10 or 20 bar water resistant, do not use it in saturation diving or
scuba diving.
WARNING

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■TROUBLESHOOTING
Trouble Possible cause
The watch stops operating.
(The chronograph hands do not move.) The power supplied by the mainspring has been consumed.
Even though you wear the watch every day, the
power reserve indicator does not move up.
The watch is worn on your wrist only for a short period of
time, or the amount of arm movement is small.
The watch temporarily gains or loses time.
The watch has been left in extremely high or low tempera-
tures.
The watch has been left close to an object with a strong
magnetic eld.
You drop the watch, hit it against a hard surface, or wear it while
playing active sports. The watch is exposed to strong vibrations.
The inner surface of the glass is clouded. Moisture has entered the watch because the gasket has deteriorated.
The watch stops even though the power reserve
indicator is not showing "0." The watch has been left at a temperature below 0℃ .
Right after starting the watch, it seems that the second
hand moves more quickly than usual when setting the time.
When starting the watch, it takes a little time before the
adjustment function starts working (this is not a malfunction).
The date changes during daytime. AM/PM is not correctly set.
※ In the event of any other problem, please contact the retailer from whom the watch was purchased.
Solution
Wind the mainspring and reset the time. While you are wearing the watch or when you take it o󱐯, check the re-
maining power shown by the power reserve indicator and wind the mainspring if necessary.
Wear the watch for an extended period of time, or when taking o󱐯 the watch, turn the crown to wind the main-
spring if the remaining power shown by the power reserve indicator is not su󱐰cient for the next use.
Return the watch to a normal temperature so that it works accurately as usual, and then reset the time. The watch has been
adjusted so that it works accurately when it is worn on your wrist under a normal temperature range between 5℃ and 35℃ .
Correct this condition by moving and keeping the watch away from the magnetic source. If this action does not
correct the condition, contact the retailer from whom the watch was purchased.
Reset the time. If the watch does not return to its normal accuracy after resetting the time, contact the retailer
from whom the watch was purchased.
Contact the retailer from whom the watch was purchased.
If the watch is left at a temperature below 0℃ , it may stop if the power reserve indicator is showing less than
one-sixth of the power reserve. In such a case, turn the crown to wind the mainspring.
It takes several seconds before the adjustment function starts working. Set the time after the second hand moves
for approximately 30 seconds to set the time correctly.
Advance the hour hands for 12 hours to correctly set the time and date.
Refer to "How to manually wind the mainspring by turning the crown" on page 54. Refer to "How to set the time" on page 57.
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グランドセイコー専用フリーダイヤル
０１２０－３０２－６１７
受付時間：月曜日～金曜日 9:30 ～ 21:00
土曜・日曜・祝日 9:30 ～ 17:30
お客様相談室
〒 100-0005 東京都千代田区丸の内 3-1-1 国際ビル
〒 550-0013 大阪市西区新町 1-4-24 大阪四ツ橋新町ビルディング
本 社 〒 105-8467 東京都港区芝浦 1-2-1
http://www.seiko-watch.co.jp/