Specifications

Gently turn the crown clockwise
(the twelve o'clock direction)
while pressing it,
until it is
screwed all the way in and
locked.
※While screwing the crown in, the
watch clicks as the mainspring is
wound. This should not cause
any concern since movement of
the mainspring causes this.
⇒If you wish to continue to set
the date and time, do not screw
the crown in but follow the
instructions of "How to set the
date " on page 56, and "How to
set the time" on page 46.
22
2
4
6
8
1
0
12
14
16
18
20
2
3
21
1
9
1
7
15
1
3
1
1
1
3
5
4
6
6
GMT
45
4
Wind the mainspring until the power reserve indicator shows a full-wound
state.
The second hand starts moving.
※To check the winding state of the mainspring, refer to "■HOW TO READ THE
POWER RESERVE INDICATOR " on page 62.
※There is no need to turn the crown further when the mainspring is fully wound. The
crown can be turned without damaging the watch mechanism; it only winds the
mainspring free.
3
44
CONTENTS
■NAMES OF THE PARTS ････････････････････････････････40
■FEATURES････････････････････････････････････････････41
■HOW TO USE
HOW TO WIND THE MAINSPRING･･････････････････････42
HOW TO SET THE TIME ･･･････････････････････････････46
HOW TO SET THE DATE ･･･････････････････････････････56
HOW TO USE THE INDEPENDENT HOUR HAND
ADJUSTMENT FUNCTION ･････････････････････････････57
■HOW TO USE THE ROTATING BEZEL ･･･････････････････59
■HOW TO READ THE POWER RESERVE INDICATOR ･･････62
■TO PRESERVE THE QUALITY OF YOUR WATCH･･････････64
■TROUBLESHOOTING ･･････････････････････････････････70
■REMARKS ON AFTER-SALES SERVICING ････････････････72
■REMARKS ON THE REPLACEMENT PARTS ･･････････････73
■SPECIFICATIONS ･････････････････････････････････････74
You are now the proud owner of a GRAND SEIKO watch.
GRAND SEIKO watches are designed and manufactured to
operate 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.
■FEATURES
Spring Drive, the unique mechanism made available only by SEIKO technology, ensures quartz
accuracy while using the mainspring as its sole power source. (For details of the Spring Drive
mechanism, refer to the separate manual "Spring Drive Handbook.")
The watch will work continuously for approximately 72 hours (three days) when the mainspring 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 first using the
watch, manual winding is convenient.
Grand Seiko SPRING DRIVE GMT, equipped with the caliber 9R66 movement with the 24-hour
hand, features the rotating bezel and outer frame of the dial on which 24-hour indicators are
imprinted. The hour hand can be independently adjusted, offering 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), or by setting the 24-hour hand in combination with
the rotating bezel, the watch can display the times of two or three different places.
41
Spring Drive works by the power provided by the mainspring. Rewind the mainspring
before the power reserve indicator shows "0".
If the watch is left under low temperatures (especially below 0℃), it may stop if the power
reserve indicator is showing less than one-sixth.
CAUTION
40
■NAMES OF THE PARTS
22
2
4
6
8
10
12
14
16
18
20
23
21
1
9
17
15
13
1
1
1
3
5
4
6
6
GMT
Hour hand
Minute hand
Crown
Unlocked：Winding up the mainspring
（manual oparation）
Locked
Rotating bezel
（with 24-hour indicators）
Outer frame of the dial
（with 24-hour indicators）
Second
hand
Date
24-hour hand
Power reserve
indicator
First click：Independent
adjustment of the hour hand
(interrelated with date setting)
Second click：Time setting
43
After unlocking the screw,
slowly turn the crown clock-
wise (the twelve o'clock direc-
tion) to wind the mainspring.
Take care not to press down
the crown.
＊As for manual winding, if you
give the crown five 360 degrees
rotations, it provides the power
to run the watch for approxi-
mately ten hours.
＊If the crown is turned counter-
clockwise (the six o'clock direc-
tion), the mainspring of the
watch will not be wound.
2
2
2
4
6
8
1
0
12
14
16
18
2
0
2
3
21
1
9
1
7
15
1
3
1
1
1
3
5
4
6
6
GMT
2
42
■HOW TO USE 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.
●How to manually wind the mainspring by turning the crown
The crown is a screw-lock
type crown. Turn the crown
counterclockwise (the six
o'clock direction) to unlock
the screw. (When the screw is
completely unlocked, it will be
projected outward a little from
its original position.)
1
22
2
4
6
8
10
12
14
16
18
20
2
3
21
1
9
1
7
15
1
3
1
1
1
3
5
4
6
6
GMT