Table Of Contents; Characteristics; Names Of The Parts And Their Function; Screw Lock Type Crown - Seiko 9R66 Instruction

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
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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
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
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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.

■NAMES OF THE PARTS AND THEIR FUNCTION

●Basic mechanism
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●The mechanism of the crown

Screw lock type crown

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 difference adjustment.)
2: Screw lock type crown is positioned for time setting.
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Before operating the screw lock type crown, it is necessary to unlock it.
In order to prevent any operational errors, once you have finished operating the crown, make
sure to relock it.
Refer to "SCREW LOCK TYPE CROWN" on the following page 51.
L ０ １ ２
How to set the calendar ............................................................ 61
How to use the 24-hour hand ................................................... 64
■TIME DIFFERENCE ADJUSTMENT FUNCTION ..................... 65
How to use the time difference adjustment function ........................ 65
Selectable display mode ............................................................ 68
How to use the rotating bezel ................................................... 69
List of time zone differences 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

■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 first 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, 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).
※ For the details of the Spring Drive mechanism, refer to the separate volume "Spring Drive Handbook".
CAUTION
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 sufficiently wound while using the watch.
Refer to "POWER RESERVE INDICATOR" on page 55.
●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.
■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
It is necessary to unlock the screw lock type crown before operating it.
Once you have finished operating the crown, make sure to relock it.
Screw lock type crown is locked.
※ Once the crown is unlocked, you can pull it out.
Screw lock type crown is unlocked.
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