2L series (2L75)
4L series (4L75)
4S series (4S71・4S76・4S77・4S79)
6L series (6L75)
6S series (6S37・6S74・6S77・6S78・6S96・6S99)
68 series (6870・6890・6898・6899)
8L series (8L36・8L75)
CR series (CR01)

BGJCCO1-2407

Thank you very much for choosing a CREDOR watch.
Only the unique melding of traditional Japanese sensitivity and state-of-

From the French “crête d’or” or “crest of gold” it signifies our commitment
to always being the very best.

Englishthe-art technology can bring you a watch of this quality and character.
Doing so is our passion. The CREDOR name is your guarantee.

We hope this CREDOR watch will be your favorite personal timepiece formany years to come.

Please read carefully the instructions in this booklet for proper and safe useof your CREDOR watch before start using it.
If your watch has a protective film for preventing scratches, make sure to peel it off before using
the watch. If the watch is used with the film on it, dirt, sweat, dust, or moisture may be attachedto the film and may cause rust.

1

CONTENTS

b WARNING

To indicate the risks of serious consequences such as severe injuries
unless the following safety regulations are strictly observed.

Immediately stop wearing the watch in the following cases.
○ If the watch body or band becomes edged by corrosion etc.
○ If the pins protrude from the band.
* Immediately consult the retailer from whom the watch was purchased or SEIKO CUSTOMERSERVICE CENTER.

English■ HANDLING CAUTIONS ....................................................................................... 3■ PERFORMANCE AND TYPE ............................................................................... 4■ WATER RESISTANT PERFORMANCE .............................................................. 4■ CAUTIONS ON WATER RESISTANCE .............................................................. 5■ CHARACTERISTICS ........................................................................................... 6■ NAMES OF THE PARTS ...................................................................................... 6■ HOW TO USE ..................................................................................................... 12• Crown .............................................................................................................. 12• How to wind the mainspring ............................................................................ 13• Power reserve indicator ................................................................................... 13• How to use (For models without a seconds hand) ........................................... 14• How to use (For models with a seconds hand or a small seconds hand) ........ 15• How to use (For models with the date) ............................................................ 16• How to use (For models with the date, day of the week, and a 24-hour hand) ....... 18• How to use (For models with the date and a 24-hour hand) ............................ 22※ List of time zone differences in major regions of the world ........................... 26• How to use the chronograph (6S series) ......................................................... 27■ TO PRESERVE THE QUALITY OF YOUR WATCH .......................................... 31• After-sale service ............................................................................................. 31• Daily care ........................................................................................................ 32• Remarks on 18-karat gold ............................................................................... 32• Watch body / metal bracelet ............................................................................ 32• Band ................................................................................................................ 33• How to use an adjustable three-fold clasp ....................................................... 34• Magnetic resistance (Magnetic influence) ....................................................... 35• Lumibrite ......................................................................................................... 36• Troubleshooting .............................................................................................. 37■ SPECIFICATIONS (Movement) ........................................................................ 38■ HANDLING CAUTIONSKeep the watch and accessories out of the reach of babies
and children.
Care should be taken to prevent a baby or a child accidentally swallowing the accessories.
If a baby or child swallows the battery or accessories, immediately consult a doctor, as it will beharmful to the health of the baby or child.

b CAUTION

To indicate the risks of light injuries or material damages unless thefollowing safety regulations are strictly observed.

Avoid wearing or storing the watch in the following places.
○ Places where volatile agents (cosmetics such as polish remover, bug repellent, thinners, etc.)
are vaporizing○ Places where the temperature drops below 5°C○ Places affected by strong vibrations○ Places of high humidity
or rises above 35°C for a long time
○ Places affected by strong magnetism or○ Dusty places
static electricity

If you observe any allergic symptoms or skin irritation

Stop wearing the watch immediately and consult a specialist such as a dermatologist or anallergist.

Other cautions○ Do not disassemble or tamper with the watch.
○ Please follow local government directions when disposing of the watch body.
○ Keep the watch out of the reach of babies and children. Extra care should be taken to avoid
risks of any injury or allergic rash or itching that may be caused when they touch the watch.
○ If your watch is of the fob or pendant type, the strap or chain attached to the watch may damage
your clothes, or injure the hand, neck, or other parts of your body.
○ Please keep in mind that if a watch is taken off and placed down as it is, the case back, the bandand the clasp will rub against each other possibly causing scratches on the case back. We
recommend placing a soft cloth between the case back, the band and the clasp after taking off
your watch.

2

HANDLING CAUTIONS

3

■ CAUTIONS ON WATER RESISTANCE

The case back shows the performance and type of your watch.

b WARNING
Do not use the watch in scuba diving or
saturation diving.

ESISTANTWATER RESISTANT 10BAR :Water resistant performance

10
BA

R

R
ER
AT
W
18

JA

PA

N

689 0-0000

000000

KT

MA

DE

IN

The various tightened inspections under simulated harsh environment,
which are usually required for watches designed for scuba diving or
saturation diving, have not been conducted. For diving, use watches
specifically designed for diving.

Serial number
Case Number
6890-0000 :Caliber Number

b CAUTION
Do not pour running water directly fromfaucet.

○ Water resistant performance
Please refer to P. 4.
○ Case number
The number to identify the type of your watch○ Serial number
The number to identify your watch

The water pressure of tap water from a faucet is high enough to degrade
the water resistant performance of a water resistant watch for everyday life.

* The above illustrations are examples and may differ from the case back of the watch you
purchased.

■ WATER RESISTANT PERFORMANCE
Refer to the table below for the description of each degree of water resistantperformance of your watch before using.
Indication on the case back Water resistant performance
No indication

WATER RESISTANT

Non-water resistance

Water resistance for everyday
life

Conditions of Use

Avoid drops of water or sweat

The watch withstands
accidental contact with water ineveryday lifeb WARNING

Not suitable for swimming

WATER RESISTANT
5 BAR
WATER RESISTANT
10 (20) BAR

4

Water resistance for everyday
life at 5 barometric pressures

Water resistance for everyday
life at 10 (20) barometricpressures

PERFORMANCE AND TYPE

English■ PERFORMANCE AND TYPE

The watch is suitable forswimming.

Do not turn or pull out the crown when thewatch is wet.

Water may get inside of the watch.
* If the inner surface of the glass is clouded with condensation or water
droplets appear inside of the watch for a long time, the water resistantperformance of the watch is deteriorated.
Immediately consult the retailer from whom the watch was purchased or
SEIKO CUSTOMER SERVICE CENTER.

Do not leave moisture, sweat and dirt on thewatch for a long time.

Be aware of a risk that a water resistant watch may lessen its water resistantperformance because of deterioration of the adhesive on the glass or
gasket, or the development of rust on stainless steel.

Do not wear the watch while taking a bath ora sauna.

Steam, soap or some components of a hot spring may accelerate thedeterioration of water resistant performance of the watch.

The watch is suitable for diving
not using an air cylinder.

CAUTIONS ON WATER RESISTANCE

5

■ CHARACTERISTICS

6898

Manual winding typewith one of the world’s thinnest movements (1.98 mm)

31

2

1 Hour hand

2 Small seconds hand
3 Minute hand
4 Crown→ P. 12English○ This watch is a mechanical watch that runs by a mainspring.
○ Before using the watch, turn the crown by hand about 20 times to wind up the mainspringof the watch.
○ While the loss / gain of a quartz watch is shown by the monthly or yearly rate, the loss /gain of a mechanical watch is shown by the daily rate (loss/gain per one day).
○ The loss / gain of a mechanical watch changes delicately day by day, depending on various
environment or conditions in which the watch is used (such as temperatures, the amountof time the watch has been worn, the amount of arm movement, and the amount that themainspring is wound up).
○ A mechanical watch may lose / gain time when it is affected by strong magnetism. If theparts of the watch become magnetized, the watch needs repair including demagnetizing.
In this case, consult the retailer from whom the watch was purchased.

4■ NAMES OF THE PARTS
Please check the caliber number of your watch before reading each operating instruction.
The caliber number can be checked on the case back of your watch. “PERFORMANCE AND
TYPE”→ P. 4
* The caliber number identifies your watch type.
* The orientation and design of the display may vary depending on the model.

How to wind the mainspring→ P. 13
How to use (For models with a seconds hand or a small seconds hand)→ P. 15

4S71

Automatic winding type (with manual winding function)

6870, 6890, 6899

Manual winding typewith one of the world’s thinnest movements (1.98 mm)

21

1 Hour hand3
1 Hour hand

2 Minute hand
3 Crown→ P. 121

2

2 Seconds hand
3 Minute hand
4 Crown→ P. 124

3

How to wind the mainspring→ P. 13
How to use (For models with a seconds hand or a small seconds hand)→ P. 15
How to wind the mainspring→ P. 13
How to use (For models without a seconds hand)→ P. 14

6

CHARACTERISTICSNAMES OF THE PARTS

7

5 Crown→ P. 12

․…・
․․・ ․

⁅″⁆
‸⁄※

⁆›⁇

‧・

・ ・ ・

‣‫‫‬

8

3 Seconds hand
5 Minute hand

6 2-o’clock crown
7 3-o’clock crown→ P. 128 Day hand

‣‣

・

・ ・

․‣

4

‷

⁆⁇

・

‫‥ ・ ‣ ‣‥・‫‬
・․

‿⁁⁀

‣…
‣․ ‣•

7

‶

⁉‷

‪

2
3

‣

‣‧

‣‥

How to wind the mainspring→ P. 13
How to use (For models with the date)→ P. 16

How to wind the mainspring→ P. 13
How to use (For models with the date, day of the week, and a 24-hour hand)→ P. 18

4S76

4S79

4

0

30

9 24-hour hand

How to wind the mainspring→ P. 13
How to use (For models with the date, day of the week, and a 24-hour hand)→ P. 18

NAMES OF THE PARTS

30

8 Day hand

3

5

5 Crown→ P. 1260

40

9

7 3-o’clock crown→ P. 12

2

10

4

8

6 2-o’clock crown

20

3

7

4 Minute hand30

4 Date hand

5 Minute hand2

2 Power reserve indicator→ P. 13
3 Small seconds hand

1
40

6

3 Seconds hand

1 Hour hand

20

5
1

2 Power reserve indicator→ P. 13Manual winding typewith a power reserve indicator

50

Automatic winding type (with manual winding function)with a retrograde-type day hand, time zone adjustment, power reserve indicator, 24-hour handand date display
1 Hour hand

8

4 Date hand⁀・․‥・․‧・
․

5

6
⁅⁇

・
…・
・

6

2 24-hour hand

1

‣

2

4 Date・‣‪・․•・4

3 Minute hand

5

English1

2 Seconds hand

・

3

・

1 Hour hand

Automatic winding type (with manual winding function)with a retrograde-type day hand, time zone adjustment, 24-hour hand and date display
1 Hour hand・・

Automatic winding type (with manual winding function)with a date display

4S77

・

2L75, 4L75, 6L75, 8L75, CR01

How to wind the mainspring→ P. 13
How to use (For models with a seconds hand or a small seconds hand)→ P. 15

NAMES OF THE PARTS

9

3

40

2

6 24-hour hand

60

15

6

30

5

2

20

5 Crown→ P. 1230
5

4 Minute hand

5
6
7
8

1

30

‣•

․

‥

0

…

‧

3

6 Minute hand
8 Date9 Crown→ P. 12

20

‣•

…

10

‣․ ‣
‣‣
‥

4

‧

2 Hour hand

3 Small seconds hand

4 Chronograph hour hand

5 Chronograph minute hand

8
9․

NAMES OF THE PARTS

30

0

0 Power reserve indicator→ P. 1315‪

9 Crown→ P. 1260

40‥

8 START/STOP button

a RESET button
How to wind the mainspring→ P. 13
How to use (For models with the date)→ P. 16
How to use the chronograph (6S series)→ P. 27

320

7 Minute hand

40

30

․

‪

6 ‧

a

6 Chronograph minute hand

30

9
0

30

2

10

50

5 Date

5
6
7

1

5

10
0

‣․ ‣
‣‣

4 Chronograph hour hand

20

20

30

40

30

40

30

15

3 Small seconds hand

…

10

20

60

5

25

2

2 Hour hand

25

30

6S74, 6S96, 6S99

‣•

6
7
8

1

10

5 Chronograph minute hand

6S74, 6S99: Manual winding type, 6S96: Automatic winding type (with manual winding
function)with a power reserve indicator, a chronograph movement
1 Center chronograph seconds
hand

20

Automatic winding type (with manual winding function)with a power reserve indicator, a chronograph movement and date display
1 Center chronograph seconds
hand

5

4 Chronograph hour hand

How to wind the mainspring→ P. 13
How to use (For models with the date)→ P. 16
How to use the chronograph (6S series)→ P. 27

50

6S37, 6S77

4

3 Small seconds hand

0 RESET button

How to wind the mainspring→ P. 13
How to use (For models with the date and a 24-hour hand)→ P. 22

3

2 Hour hand

7 START/STOP button

‣․ ‣
‣‣

‪

4

6

9

1 Center chronograph seconds
handEnglish1

3 Date10

42 Seconds hand25

1 Hour hand

Automatic winding type (with manual winding function)with a chronograph movement and date display

20

Automatic winding type (with manual winding function)with time zone adjustment, 24-hour hand and date display

6S78

50

8L36

0

6 Minute hand

7 START/STOP button
8 Crown→ P. 129 Power reserve indicator→ P. 13
0 RESET button

How to wind the mainspring→ P. 13
How to use (For models with a seconds hand or a small seconds hand)→ P. 15
How to use the chronograph (6S series)→ P. 27

NAMES OF THE PARTS

11

■ HOW TO USE

How to wind the mainspring

Manual winding type (the procedure below is the same
when you wind up an automatic winding type by hand)

Crown
While
pressing thecrown in, turn itin the direction
indicated by
the arrow.

Normal crown

The
crown
turns.

The crown
does notturn.

1 Do not pull the crown out.
(If the watch is equipped with the screw down crown, unscrew the crown before pulling itout.)

2 Slowly turn the crown clockwise towind the mainspring.

EnglishThere are two types of crowns, the regular one and one that can be locked.
Please confirm the crown of the watch that you are using.

Pull out the crown and operate it.
Screw down crown
Unlock the crown
before operating it.

* By locking the crown by screw, ascrew down crown can prevent
malfunction and increase water
resistance.

* Be careful not to screw the crownin by force as it may damage theslots of the crown.
* Turn the crown from time to time. → P. 32

After operating thecrown, lock it.

Unscrew
Rotate whilepressing
the crown in.

* When the mainspring approaches full-winding, turning of the crown is heavy more or
less, however, this is caused by reaction force of the wound mainspring, which is not
defective.
* It is structured so that the crown can be further turned in the full-winding state. Although
it is not necessary to worry about cutting the mainspring, refrain from excessive turning.
(2L, 4S, 6L, 6S, 4L 8L and CR01 series)

3 Please wind the mainspring fully everyday at a fixed time to keep the watch moving
accurately.

b CAUTION

In case of 68 series watches that have thin movement, it becomes harder to turn the crownwhen the mainspring is fully wound up.
Be careful not to keep turning the crown forcibly. Otherwise the mainspring may be cut.

Automatic winding type (with manual winding function)○ The mainspring can be sufficiently wound automatically by natural movement of the arm
while normally worn on the wrist. In addition, it can be wound by turning the crown.
○ A stopped watch can be started by arm movement when it is worn on the wrist, however,before wearing the watch, wind the mainspring sufficiently and adjust the time and date.

* It is recommended that you wear the watch on your wrist more than 10 hours a day to keep
the mainspring wound up. If the mainspring is not wound up sufficiently, the watch may
lose or gain time. If you use the watch without wearing on your wrist, wind the mainspring
up sufficiently by turning the crown by hand every day at a fixed time.

Power reserve indicator
The power reserve indicator lets you know the winding state of the mainspring.
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 willallow the watch to run for extra time.)

12

HOW TO USE

How to wind themainspring
HOW
TO USE

13

How to use (For models without a seconds hand)

Models: 6870, 6890, 6899
How to set the time

2 Pull out the crown.
(If the watch is equipped with thescrew down crown, unscrew thecrown before pulling it out.)* If the watch is a 68 series model,
it continues to move when thecrown is pulled out.

3 Turn the crown to set the hour andminute hands to the time.

Models: 6898, 4S71, 4S79, 6S74, 6S96, 6S99
How to set the time

1 Make sure that the watch is operating.
To carry out the procedure, please make sure that the watch is in working state.
Please wind the mainspring when the watch is not working.
“How to wind the mainspring”→ P. 13

English

1 Make sure that the watch is operating.
To carry out the procedure, please make sure that the watch is in working state.
Please wind the mainspring when the watch is not working.
“How to wind the mainspring”→ P. 13

How to use (For models with a seconds hand ora small seconds hand)

2 Pull out the crown when the seconds
hand (or the small seconds hand) isat the 12 o’clock position. (Theseconds hand or the small seconds
hand will stop.)(If the watch is equipped with thescrew down crown, unscrew thecrown before pulling it out.)* If the watch is a 6898 model, thesmall seconds hand continues tomove when the crown is pulled
out.
3 Turn the crown to set the hour andminute hands to the time.

4 Push the crown back in to its normal
position.
(If the crown of your watch is ascrew lock type, lock the crown.)
4 Push the crown back into the normal
position in accordance with a time
signal.
(If the crown of your watch is ascrew lock type, lock the crown.)b CAUTION

Due to its gear train mechanism, for setting the time of the mechanical watch correctly, thehands should be set back once slightly and then set forward to the correct time.

b CAUTION

Due to its gear train mechanism, for setting the time of the mechanical watch correctly, thehands should be set back once slightly and then set forward to the correct time.

14

How toTO
use(For models without a seconds hand)
HOW
USE

How to use (For models with a seconds hand or a small seconds
HOW TOhand)
USE

15

How to use (For models with the date)

Models: 2L75, 4L75, 6L75, 8L75, CR01, 6S37, 6S77, 6S78

b CAUTION

How to set the time and dateThis watch is equipped with the date display function. The date changes once every 24 hours
at around midnight.
Therefore, if the a.m./p.m. is incorrectly set, the date will change around 12:00 p.m.
1 Make sure that the watch is operating.
To carry out the procedure, please make sure that the watch is in working state.
Please wind the mainspring when the watch is not working.
“How to wind the mainspring”→ P. 13

2 Pull out the crown to the first click.
(If the watch is equipped with thescrew down crown, unscrew thecrown before pulling it out.)

6

EnglishDo not amend the date when the watch is displaying between 8:00 p.m. and 2:00 a.m.
If the date is set during this period of time, the date may not change when the next day comes,
or this may cause damage.

4 Pull out the crown to the second
click. Pull out the crown when theseconds hand (or the small seconds
hand) is at the 12 o’clock position.
(The seconds hand or the small
seconds hand will stop.)
Turn the crown clockwise until thedesired date appears. The time isnow set for the a.m. period. Further
turn the crown to set the current
time
5 Push the crown back into the normal
position in accordance with a time
signal. The watch starts operating.
(If the crown of your watch is ascrew lock type, lock the crown.)

6b CAUTION
5

Due to its gear train mechanism, for setting the time of the mechanical watch correctly, thehands should be set back once slightly and then set forward to the correct time.

Date adjustment at the end of the month

It is necessary to adjust the date after February (which has 28 days, 29 days in a leap year)
and a 30 day month.

3 The date can be adjusted by turning
the crown clockwise (12 o’clock
direction).
First turn the crown clockwise until
the previous day’s date from thedesired date appears.
【Ex.】 If you want to set the dateto “6,” set the date to “5”by turning the crownclockwise.

5【Ex.】 To adjust the date in the a.m. period on the first day of a month following a 30-daymonth
On the first day, “31” is displayed. Pull out
the crown to the first click. Turn the crownclockwise (12 o’clock direction) to set thedate to “1”, and push the crown back in to
the normal position.
1b CAUTION○ For models with a screw down crown, remember to screw the crown in.
○ Do not amend the date when the watch is displaying between 8:00 p.m. and 2:00 a.m.
Doing so may cause damage.

16

How toTO
use(For models with the date)
HOW
USE

How to use (For modelsHOW
with theTOdate)USE

17

How to use (For models with the date, day of theweek, and a 24-hour hand)

5 Pull out the 2 o’clock position crownto the first click.

Models: 4S76, 4S77

Do not adjust the date and day when the time the watch indicates between 9:30 p.m. and2:30 a.m.
Amending the date or the day of the week during this time period may cause problems suchas the date or the day of the week failing to change the next day or may cause damage.

How to set the time, date and day

This watch is equipped with a date and day of the week display function. The date and dayof the week change once every 24 hours.
The date changes around midnight, and the day of the week changes at around 2:30 a.m. If
the a.m./p.m. is incorrectly set, the date will change at 12 o’clock noon, and the day of theweek will change at around 2:30 p.m.
1 Make sure that the watch is operating.
To carry out the procedure, please make sure that the watch is in working state.
Please wind the mainspring when the watch is not working.
“How to wind the mainspring”→ P. 13

Englishb CAUTION

6 Turn the 2 o’clock position crown to
set the hour hand to the 12 o’clock
position.
* The crown can be turned either
clockwise or counterclockwise
without any problem.

7 Push the 2 o’clock position crown back to its normal position.
8 Pull out the 3 o’clock position crownto the first click.

2 Pull out the 3 o’clock position crownto the second click.
(If the watch is equipped with thescrew down crown, unscrew thecrown before pulling it out.)

3 Turn the 3 o’clock position crown to
set the 24-hour hand and the minutehand to the 12 o’clock position.

4 Push the 3 o’clock position crown back to its normal position.
* If the hour hand is not aligned with the 12 o’clock position, go to step 5.
If the hour hand is aligned with the 12 o’clock position, proceed to step 8.

18

How toTO
use(For models with the date, day of the week, and a 24-hour hand)
HOW
USE

9 Turn the 3 o’clock position crownuntil the previous day’s date and dayof the week from the desired dateappears.
【Ex.】 If you want to set the dateto “6,” set the date to “5”by turning the crownclockwise.
Turn the crown counterclockwise(6 o’clock direction) to set thedate, and turn the crownclockwise (12 o’clock direction) to
set the day of the week.

Set the day of
the week

Set the date

* When the day is adjusted by turning the crown clockwise, the mainspring is also wound.
This makes turning the crown a little heavy but this is not a malfunction.

How to use (For models with the date, day of the week, and a HOW
24-hour
TOhand)USE

19

Time difference adjustment function

This caliber is equipped with a “time zone adjustment mechanism.” By using the 2 o’clock
position crown, the hour hand can be independently adjusted in one-hour increments.
This eliminates the trouble of stopping the watch to adjust the time when you travel abroad.
In addition, by using the 24-hour hand (GMT hand) at the center of the watch, the watch canbe used as a dual time watch that shows home time and local time.

How to use the time difference adjustment function
1 Check that the 3 o’clock position
crown is at its normal position. Thenpull out the 2 o’clock position crownto the first click.

English0 Pull out the 3 o’clock position crownto the second click. Pull out thecrown when the seconds hand is at
the 12 o’clock position. (Theseconds hand will stop.)
Turn the 3 o’clock position crownuntil the desired date and day
appears. When the date and daychanges, the time is a.m. Further
turn the crown to set the current
time.
a Push the crown back in to the normal position in accordance with a time signal. The watch
starts operating.
(If the crown of your watch is a screw lock type, lock the crown.)b CAUTION○ Due to its gear train mechanism, for setting the time of the mechanical watch correctly, thehands should be set back once slightly and then set forward to the correct time.
○ Do not turn the minute hand counterclockwise at and around 1:00 a.m. while the date handis showing“ Monday”. Otherwise, the hour hand may turn free.
If the minute hand is turned clockwise to set the time around 1:00 a.m., the hour hand will
not turn free.

2 Turn the 2 o’clock position crown to
set the time of your destination.

Date adjustment at the end of the month

It is necessary to adjust the date after February (which has 28 days, 29 days in a leap year)
and a 30 day month.

【Ex.】 To adjust the date in the a.m. period on the first day of a month following a 30-daymonth
On the first day, “31” is displayed. Pull out
the crown to the first click. Turn the crowncounterclockwise (6 o’clock direction) to
set the date to “1,” and push the crown backinto the normal position.

b CAUTION

3 On completing the adjustment of the 24-hour hand, push the 2 o’clock position crown backto its normal position.
* After the hour hand has been adjusted to the local time, the 24-hour hand still shows
the original time (home time), allowing the watch to be used as a dual time indicator.

b CAUTION

When adjusting the time zone using the 2 o’clock position crown, if the crown is turned withthe 3 o’clock position crown pulled to the second click (where hands can be turned), thetime zone adjustment mechanism may fail to work and the time zone may not be adjusted.
Therefore, ensure that the 3 o’clock position crown is pushed to its normal position when
adjusting the time zone.

○ For models with a screw down crown, remember to screw the crown in.
○ Do not adjust the date when the time the watch indicates between 9:30 p.m. and 2:30 a.m.
Doing so may cause damage.

20

How toTO
use(For models with the date, day of the week, and a 24-hour hand)
HOW
USE

How to use (For models with the date, day of the week, and a HOW
24-hour
TOhand)USE

21

How to use (For models with the date and a 24hour hand)

Model: 8L36

5 To move on to the hour hand anddate setting, pull out the crown to thefirst click.

This watch is equipped with the date display function. The date changes once every 24 hours
at around midnight.
Therefore, if the a.m./p.m. is incorrectly set, the date will change around 12:00 p.m.
To set the time and date, set the 24-hour hand and minute hand first, and then set the hour
hand and date.
1 Make sure that the watch is operating.
To carry out the procedure, please make sure that the watch is in working state.
Please wind the mainspring when the watch is not working.
“How to wind the mainspring”→ P. 13
2 Pull out the crown to the second click
when the seconds hand is at the
12 o’clock position. (The seconds
hand stops.)(If the watch is equipped with thescrew down crown, unscrew thecrown before pulling it out.)

3 Turn the crown clockwise to set the
24-hour and minute hands to thecurrent time of your area.
While doing so, set the minute handa few minutes behind the correcttime, and then slowly advance it to
the desired time.
* Only the 24-hour and minutehands are to be set first. Even if
the hour hand is indicating
incorrect time, or the date may bealtered depending on theposition of the hour hand, it is notnecessary to make anadjustment at this stage.
4 Push the crown back in simultaneously with the time signal.
* The setting of the 24-hour, minute and seconds hands is now completed.

EnglishHow to set the time and date

6 Turn the crown to set the hour hand.
While turning the crown, the moment
the date changes is midnight. Whensetting the hour hand, be sure thata.m./p.m. is set correctly.
Set the date also at this point if
necessary.

* The crown can be turned in either direction to set the date, however, it is recommended toturn 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 setting the hour hand, the other hands may move slightly. However, this is not a
malfunction.
* If you set the date between 10 p.m. and 0 a.m. by turning the hour hand counterclockwise,
turn the hour hand until it shows sometime between 9 p.m. and 10 p.m. once, then set thedate.
* In case the hour hand is turned counterclockwise, the date will be put back when the hour
hand shows around 10 p.m., however, it is not malfunction.
7 Push the crown back in to complete the time setting.
(If the crown of your watch is a screw lock type, lock the crown.)

Date adjustment at the end of the month

It is necessary to adjust the date after February (which has 28 days, 29 days in a leap year)
and a 30 day month.

【Ex.】 To adjust the date in the a.m. period on the first day of a month following a 30-daymonth
On the first day, “31” is displayed. Pull out
the crown to the first click. Turn the crownclockwise (12 o’clock direction) to set thedate to “1”, and push the crown back in to
the normal position.

b CAUTION

For models with a screw down crown, remember to screw the crown in.

22

How toTO
use(For models with the date and a 24-hour hand)
HOW
USE

How to use (For models with the date and a HOW
24-hour
TOhand)USE

23

How to use the 24-hour handThis watch has two different types of 24-hour hand usage.
When you use as a dual time indicator, set the 24-hour and hour hands to different times.
<Type 1>

: 24-hour hand as ana.m./p.m. indicator<Type 2>: 24-hour hand as a dual
time indicator

3 Turn the crown to set the hour hand to indicate the time of the place where you are staying.
Make sure that a.m./p.m. and date are correctly set.
* The date is designed to work in conjunction with the movement of the hour hand,
therefore, incorrect setting of a.m./p.m. will cause the date to change at noon.
“List of time zone differences in major regions of the world”→ P. 26

EnglishSimply using the 24-hour hand to show the
24-hour time as an a.m./p.m. indicator. (Thisis the standard usage type for the 24-hour
hand.)

Using the time difference adjustment
function, set the 24-hour hand to indicate atime different from the time that the hour andminute hand indicate, which is of a place ina different time zone area with at least one
hour of time difference from where you are.

Both the hour hand and the 24-hour hand are
indicating the Japan time 10:00 a.m.

Hour hand
24-hour Hand

: Japan time 10:00 a.m.
: London time 1:00 a.m.

Time difference adjustment function

For example, while traveling abroad and staying in a place with a different time from where
you live, you can conveniently set the watch to indicate the local time in the different timezone area without stopping the watch.
The hour hand indicates the time of the place where you currently are, while the 24-hour handindicates the time of the place of origin.
The date works in conjunction with the movement of the hour hand. If the time difference iscorrectly adjusted, the watch displays the correct date of the place where you are staying.

Turning the crownclockwise(12 o’clock direction):
The hour hand isadvanced one hour.

Turning the crowncounterclockwise(6 o’clock direction):
The hour hand is set
back one hour.

* The crown can be turned in either direction to set the date, however, it is recommended toturn the crown in the direction which enables you to set the time difference 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 setting the hour hand, the other hands may move slightly. However, this is not a
malfunction.
* If you set the date between 10 p.m. and 0 a.m. by turning the hour hand counterclockwise,
turn the hour hand until it shows sometime between 9 p.m. and 10 p.m. once, then set thedate.
* In case the hour hand is turned counterclockwise, the date will be put back when the hour
hand shows around 10 p.m., however, it is not malfunction.

4 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.
(If the crown of your watch is a screw lock type, lock the crown.)

How to use the time difference adjustment function
1 Make sure that the watch is operating.
To carry out the procedure, please make sure that the watch is in working state.
Please wind the mainspring when the watch is not working.
“How to wind the mainspring”→ P. 13
2 Pull out the crown to the first click.
(If the watch is equipped with thescrew down crown, unscrew thecrown before pulling it out.)24

How toTO
use(For models with the date and a 24-hour hand)
HOW
USE

How to use (For models with the date and a HOW
24-hour
TOhand)USE

25

List of time zone differences in major regions of the world-8 hours-9 hours-13 hours
HMontreal
HMexico City

-17 hours

HVancouver-10 hours-19 hours

HWellington+12 hours+3 hours

HAuckland+1 hour

Guam

NouméaHSydney-11 hours+11 hours+10 hours

5 RESET button

10

20

…

6 ‧

5

25

* The orientation and design of the display may vary depending on the model.

-18 hours

Honolulu

Midway Island

‣․ ‣
‣‣

3 30-minute dial
Chronograph minute hand30

-15 hours-16 hours

35

15-7 hours

2-12 hours-14 hours

30

2 12-hour dial
Chronograph hour hand

4 START/STOP button

10-6 hours

HLisbon-10 hours

15

20-5 hours

HRome, HBerlin

10-4 hours

60

4
40

‥

-3 hours

HAthens0

HAnchorage-1 hour-8 hours-9 hours

Baghdad530

30

HLos Angeles

0 hours-7 hours

55

1 Center chronograph seconds hand․

HDenver+1 hour-6 hours

60‪

HChicago+3 hours+2 hours-5 hours

3

1

30

HNew York+4 hours

Names of the chronograph parts and their function

40

Santo Domingo-4 hours-3 hours

40

HAzores
Rio de Janeiro+5 hours+6 hours

Hong Kong, Singapore

20

HParisHLondonJakarta5

JeddahCairo-2 hours

25

Dubai

+7 hours

20

KarachiSeoul, Pyongyang-1 hour

2 Make sure that the center chronograph seconds hand is pointing at the 0 position.
If it is not pointing at the 0 position, press the RESET button.
* Do not pull out the crown while the stopwatch function is operating, as doing so will stop
the measurement.

‣•

BangkokDacca

0 hours+8 hours

1 Make sure that the mainspring is sufficiently wound.
When using the stopwatch, ensure that the watch is working.

50+9 hours

Beijing

Other cities in the same
regionBefore using the stopwatch function

50

Tokyo

Time difference
from Japan
Standard Time(JST)

A chronograph is a watch that has a stopwatch function in addition to a time
display function. This watch features a stopwatch function which can measuretime up to 12 hours in 1/8-second increments.

45

Time difference
from Universal
Names of the cities
Time Coordinated(UTC)

How to use the chronograph (6S series)

English* There are time zone differences based on time offsets from Universal Time Coordinated(UTC), which has been internationally adopted. The world is divided into 24 time zones, andneighboring time zones have a one-hour time difference, so that they correspond to therotation of the earth which makes one full rotation in 24 hours (1 day). In some regions of theworld, daylight saving time is individually observed.
* Daylight saving time, being defined as time difference +1 hour, is a system that advances thetime by 1 hour during summer time to prolong the daylight hours.

-20 hours+2 hours* Regions marked with H use daylight saving time
* The time zone differences of each region and use of daylight saving time are based on data
as of January 2023. These are subject to change according to the governments of therespective countries or regions.

26

How toTO
use(For models with the date and a 24-hour hand)
HOW
USE

How to use the chronograph(6STO
series)
HOW
USE

27

How to use the chronograph (stopwatch) function

Press the START/STOP button to begin measuring time.
Pressing START/STOP button repeatedly enables the chronograph to continue to count.
1 Make sure that the mainspring is sufficiently wound and the watch is working.
5

25

10

10

50

5

20

40

15

30

60
50
45

15

20

30
20

10

‣․ ‣

20

‥

40

…

‪

6 ‧

35

25

30

60

55

5

10

10

50

5

25

30

20

40

15

30

60
50
45

20

10

‣․ ‣
‥

40

…

‪

6 ‧

35

* The chronograph minute hand on
the 30-minute dial completes two
full rotations in an hour.
To read the 30-minute dial, see
the display of the 12-hour dial asa rough indication.

20

․

‣•

‣‣

1 km

The measured result shows that the
average speed of the vehicle is 80
km/h.

0

30

【Ex.】 6 hours 20 minutes
10 seconds and 0

15

20

30

40

3 Stop measuring time.
At the moment you want to finish themeasurement, press the START/STOP button again to stop thechronograph hands.

1 When the car passes the start line,press the START/STOP button tostart the stopwatch.
2 When the car crosses the 1kilometer mark, press the START/STOP button to stop the stopwatch.
Read the number on the tachymeterscale to which the center stopwatch
seconds hand is pointing.

․

‣•

‣‣

0

30

How to measure average speed of your vehicle
English30

The tachymeter can be used to measure average speed or productivity rate per unit time.

【Ex.】 Measure the time taken by your vehicle to go one kilometer

60

55

40

2 Start measuring time.
Upon pressing of the START/STOP
button, the chronograph hands
start moving and the stopwatch
starts measuring time.

How to use the tachymeter

25

30

How to compute productivity rate per hour【Ex.】 Measure the time required to produce one unit
1 At the start of production, press the
START/STOP button to start the
stopwatch.

60

55

5

10

10

50

5

25

30

20

40

15

30

60
50
45

20

10

‣․ ‣
‥

40

20

․

‣•

‣‣

0

30

6 ‧

…

‪
35

15

20

30

40

4 Reset the chronograph hands.
After stopping the chronographhands, press the RESET button to
return all the chronograph hands tothe 0 position.

30

25

2 When the production is completed,press the START/STOP button tostop the stopwatch. Read thenumber on the tachymeter scale towhich the center stopwatch seconds
hand is pointing.
The measured result shows that the
average productivity rate is 300
units/h.

28

How toTOuse
the chronograph (6S series)
HOW
USE

1 unit

How to use the chronograph(6STO
series)
HOW
USE

29

How to use the telemeter

The TELEMETER scale can be used to measure the distance of something (ex: lightning)from the wearer of the watch by the amount of time it takes for a sound to travel.
【Ex.】 These are the steps to measure the time from when lightning appeared to when thesound reached the wearer.

2 When the thunder is heard, press the
START/STOP button to stop the
stopwatch, then read the number on
the telemeter at the positionindicated by the center stopwatch
seconds hand.
The measurement result showsthat it is 8km from the point where
the wearer is to the point where thelightning struck.

After-sale service

Notes on guarantee and repair

The elapsed timeafter a flash is seen
until thunder is heard○ Contact the retailer from whom the watch was purchased or SEIKO CUSTOMER SERVICECENTER for repair or overhaul.
○ Within the guarantee period, present the certificate of guarantee to receive repair services.
○ Guarantee coverage is provided in the certificate of guarantee. Read carefully and retainit.
○ For repair services after the guarantee period has expired, if the functions of the watch canbe restored by repair work, we will undertake repair services upon request and payment.

English1 Press the START/STOP button
when a flash of lightning appears tostart the stopwatch.

■ TO PRESERVE THE QUALITY OF YOUR
WATCH

Replacement parts○ Please keep in mind that if original parts are not available, they may be replaced with
substitutes whose outward appearance may differ from the originals.

Inspection and adjustment by disassembly andcleaning (overhaul)○ Periodic inspection and adjustment by disassembly and cleaning (overhaul) is
recommended approximately once every 2 to 3 years in order to maintain optimal
performance of the watch for a long time.
○ The power transmission gear of the movement of this watch constantly receives force. To
ensure that this mechanism works properly all the time, washing parts, changing oil,adjusting accuracy, checking functions and replacing consumable parts on a regular basis
are important. The first overhaul after the purchase of your watch is particularly importantfor preserving long-time use of your watch. According to use conditions, the oil retaining
condition of your watch mechanical parts may deteriorate, abrasion of the parts may occur
due to contamination of oil, which may ultimately lead the watch itself to stop.
As the parts such as the gasket may deteriorate, water-resistant performance may be
impaired due to intrusion of perspiration and moisture.
Please contact the retailer from whom the watch was purchased for inspection andadjustment by disassembly and cleaning (overhaul). For replacement of parts, please
specify “SEIKO GENUINE PARTS”. When asking for inspection and adjustment by
disassembly and cleaning (overhaul), make sure that the gasket and push pin are also
replaced with new ones.
○ When your watch is inspected and adjusted by disassembly and cleaning (overhauled),
the movement of your watch may be replaced.

30

How toTOuse
the chronograph (6S series)
HOW
USE

TO PRESERVE THE QUALITY OF YOUR WATCH

31

Daily care

The watch requires good daily care

Turn the crown from time to time. (Only several turns inslow movement will be enough.)○ This prevents corrosion of the crown and helps to extend the life of the gasket in use.
○ The same practice should be applied to a screw down crown. (No need to pull out the screw
down crown.)“Crown”→ P. 12○ Stainless steel is a highly rust-resistant metal. However, rust will form if contaminants areleft on it for a long time.

Remarks on 18-karat gold
○ 18-karat gold (18KT) is an alloy comprised of 75% of gold and 25% of other metals.
Depending on the proportion of the other metals mixed with the gold, the 18-karat gold isclassified into three colors such as yellow gold (YG), white gold (WG) and pink gold (PG).

Decoloration of 18-karat gold

○ While gold can maintain its glittering quality, other metal components in the alloy may
discolor to look like reddish or blackish due to various reasons.
○ Daily care helps to prevent discoloration of the alloy, however, if the discoloration or stainof the alloy persists even after wiping the watch off, take your watch to the retailer fromwhom the watch was purchased for refinishing. (Refinishing will be done at a cost.)

Watch body / metal bracelet

Length adjustment service○ For the length adjustment service of the 18-karat gold or platinum bracelet, ask the retailer
from whom the watch was purchased.
The watch will be submitted to CREDOR SERVICE STUDIO for the length adjustment.
It may take two to three weeks depending on the model to adjust the length of the bracelet.
○ The length adjustment service of the 18-karat gold, platinum or stainless steel mesh bracelet
will not be charged only for the first time. However, the cost for materials or parts necessary
for the length adjustment and repair cost other than the length adjustment will be charged.
○ The length adjustment service of stainless-steel band is available from the retailer fromwhom the watch was purchased or SEIKO CUSTOMER SERVICE CENTER. Some otherretailers may charge you for the length adjustment or may not undertake such treatments.

Periodic cleaning○ Periodic cleaning is highly recommended to enjoy the best quality of the watch for a longtime.
Ask the retailer from whom the watch was purchased or the CREDOR SERVICE STUDIO
through your nearby CREDOR retailers. (Cleaning may be done at a cost.)

32

TO PRESERVE THE QUALITY OF YOUR WATCH

The band touches the skin directly and becomes dirty from 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 along 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. (Protect the watch body from water splashes by wrapping it up in
plastic wrap etc.)
Wipe off the remaining moisture with a soft cloth.
○ Because some titanium bracelets use pins made of stainless steel, which has outstanding
strength, rust may form in the stainless steel parts.
○ If rust advances, pins may poke out or drop out, and the watch case may fall off the bracelet,or the clasp may not open.
○ If a pin is poking out, personal injury may result. In such a case, refrain from using the watch
and request repair.

English○ The watch body and band touch the skin directly just as underwear.
Keep the watch body and band clean in order to avoid stain on the sleeve edge or rash or
itch.
After removing the watch from your wrist, wipe perspiration or moisture with a soft cloth assoon as possible.
○ Do not use any chemical agent such as cleaner to clean the watch.

Band

Leather band

○ A leather band is susceptible to discoloration and deterioration from moisture, sweat anddirect sunlight.
○ Wipe off moisture and sweat as soon as possible by gently blotting them up with a dry cloth.
○ Do not expose the watch to direct sunlight for a long time.
○ Please take care when wearing a watch with light-colored band, as dirt is likely to show up.
○ Refrain from wearing a leather band watch other than Aqua Free bands while swimming,
and when working with water even if the watch itself is water-resistant enforced for dailyuse.

Polyurethane band

○ A polyurethane band is susceptible to discoloration from light, and may be deteriorated bysolvent 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, have the band replaced with a new one. If you
continue to use the band as it is, the band may develop cracks or become brittle over time.

Notes on skin irritation and allergy

Skin irritation caused by a band has various reasons such as allergy to metals or leathers, orskin reactions against friction on dust or the band itself.

Notes on the length of the band

Adjust the band to allow a little clearance with your wrist to ensure proper airflow.
When wearing the watch, leave enough room to insert a finger between the bandand your wrist.

TO PRESERVE THE QUALITY OF YOUR WATCH

33

How to use an adjustable three-fold clasp

Magnetic resistance (Magnetic influence)

Adjustable three-fold clasp

Affected by nearby magnetism, a watch may temporarily gain or lose time or stop operating.
This watch is a magnetic resistant watch that is fully compliant with JIS level-1 standard.
Conditions of use

How to adjust the length of the band
1 Thread the tip of the band to the buckle.
Buckle(JIS-1)

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.

2 Slide the band to adjust its length and findthe appropriate hole. Place the pin into thehole.

EnglishKeep the watch more than 5 cm away from magnetic products.

Examples of common magnetic products that may affect watches

Tip

Pin

Adjustinghole

How to wear the watch

Insert the tip of the band into the fixed loop andmovable loop, and push the buckle down tofasten the clasp.

Smartphone, cellular phone, tablet terminal(speaker, magnet of cover)AC adapter

Bag(with magnet
buckle)Magnetic
necklace

Magnetic healthpillow

Fixed loop
BuckleMovable loop

Tip

How to take off the watch

Place your finger between the band and clasp. Pinch the band with your fingers and pull it
forward to open the clasp.
* Do not pull the tip of the band to open the clasp, as this may damage the band.

AC-powered
shaverMagnetic
cooking device

Portable radio(speaker)

The reason why this watch is affected by magnetism

The built-in balance spring is provided with a magnet, which may be influenced by a strong external
magnetic field.

Buckle* If it is difficult to open the band following the above procedure, hold both sides of the buckle
to open the clasp.

34

TO PRESERVE THE QUALITY OF YOUR WATCH

TO PRESERVE THE QUALITY OF YOUR WATCH

35

Lumibrite

Troubleshooting

If your watch has Lumibrite

Reference data on the luminance
Condition

Sunlight
Indoor (Window-side
during daytime)
Lighting apparatus(40-watt daylightfluorescent light)

Fine weather

Cloudy weather

100,000 lux

Illumination

10,000 lux

Fine weather

more than 3,000 lux

Rainy weather

less than 1,000 lux

Cloudy weather
Distance to the watch: 1 m
Distance to the watch: 3 m
Distance to the watch: 4 m

1,000 to 3,000 lux

TroublesSolutionsWind the mainspring or swing thewatch for a few times so that the
The watch stops
watch will start operating.
The mainspring has not been wound.
operating.
If this action does not correct thecondition, consult the retailer fromwhom the watch was purchased.

The watch has been left in extremely Normal accuracy will resume whenhigh or low temperatures for a long the watch returns to normal
time.
temperature.
The watch was brought into close
contact with a magnetic object.

Accuracy cannot be recovered.
Restoring the original accuracy
requires demagnetization (repair).
Consult the retailer from whom thewatch was purchased.

The watch loses/
gains time.
The watch was dropped, worn while
Accuracy cannot be recovered.
playing active sports, hit against hard
Consult the retailer from whom thesurfaces, or exposed to strong
watch was purchased.
vibrations.

1,000 lux

500 lux (average room luminance)
250 lux

Possible causes

EnglishLumibrite is a luminous paint that absorbs light energy of the sunlight and lighting apparatus in a shorttime and stores it to emit light in the dark. For example, if exposed to a light of more than 500 lux forapproximately 10 minutes, Lumibrite can emit light for 3 to 5 hours. Please note, however, Lumibriteemits 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.
* In general, when you enter a dark place from a bright environment, your eye cannot adapt to thechange in light levels quickly. At first, you can hardly see anything, but as time passes, your vision
gradually improves. (Dark adaptation of the human eye)
* Lumibrite is a luminous paint that is completely harmless to human beings and the naturalenvironment; containing no noxious materials such as radioactive substance.

The datechanges during
daytime.

Inspection, adjustment, andoverhaul cleaning have not been
performed for the watch for morethan 3 years.

Consult the retailer from whom thewatch was purchased.

A.m./p.m. is not correctly set.

Advance the hour hand for 12 hours
and reset the time and date.

Small amount of water has got inside
Blur in the display
Consult the retailer from whom thethe watch due to deterioration of thepersists.
watch was purchased.
gasket, etc.

* For the solution of troubles other than above, contact the retailer from whom the watch waspurchased.

36

TO PRESERVE THE QUALITY OF YOUR WATCH

TO PRESERVE THE QUALITY OF YOUR WATCH

37

■ SPECIFICATIONS (Movement)
Cal. NO

6870

6890

Features

Daily rate +25 sec. to -15 sec.

Duration

Approx. 37 hours

Driving system
22 jewels
2L75

Features
Vibrations/hour
Loss/Gain
Driving system
Duration

4L75

Daily rate
+25 sec. to-15 sec.

26 jewels
8L75

Approx.
50 hours

8L36

Hour, minute,and seconds
hands, and24-hour hand

Approx.
42 hours

FeaturesHour, minute, andseconds hands

Approx. 45 hours

25 jewels

Vibrations/hour

26 jewels
4S76

4S77

Cal. NO
Features
Vibrations/hour
Loss/Gain

Duration

Approx. 50 hours
27 jewels
4S79

Hour, minute,
Hour, minute, andseconds, 24-hour
Hour, minute,small seconds
hands, power
seconds, 24-hour,hands, and power
reserve indicator, date, and day hands
reserve indicatordate and day hands

Jewels

6S77

6S78

Hour, minute, small
seconds, center
Hour, minute, small seconds, center chronograph,chronograph, chronographchronograph 30-minute, and chronograph 12-hour hands,
30-minute, anddate, and power reserve indicator
chronograph 12-hourhands, and date
28,800Daily rate +15 sec. to -10 sec.

Automatic winding type (with manual winding function)

JewelsDriving system

Automatic winding type (with manual winding function)

4S71

JewelsCR01

Duration

Daily rate +15 sec. to -10 sec.

Cal. NO

Duration

6L75

Driving system

28,80035 jewels

Driving system

Loss/Gain

Hour, minute, and seconds hands, and date

Jewels

Loss/Gain

Vibrations/hour

Manual winding type

JewelsFeatures

6S37

40 jewels
6S96

Approx. 50 hours

English

21,600Loss/Gain

Cal. NO

6898

Hour, minute, andsmall seconds hands

Hour and minute hands

Vibrations/hour

38

6899

Cal. NO34 jewels

6S74

6S99

Hour, minute, small seconds, center chronograph, chronograph 30-minute, andchronograph 12-hour hands, and power reserve indicator
28,800Automatic winding type (withmanual winding function)
38 jewels

Daily rate +15 sec. to -10 sec.
Manual winding type
Approx. 60 hours

35 jewels* The loss/gain specified above is factory-adjusted.
* Due to the mechanical watch mechanism, actual loss/gain may not fall within the range ofthe loss/gain specified above, depending on various environment or conditions (including
temperatures, arm movement, the amount the mainspring is wound up, and other conditions
in which the watch is worn).

28,800Daily rate +15 sec. to -10 sec.

Automatic winding type (with manual winding function)

Approx. 40 hours
25 jewels

SPECIFICATIONS (Movement)

Approx. 50 hours

31 jewels

28 jewels

Manual winding type
Approx. 40 hours
31 jewels

SPECIFICATIONS (Movement)

39