Seiko Watch 7S26 User Guide

You are now the proud owner of a SEIKO Automatic Diver’s Watch  
Cal. 7S26. For best results, please read the instructions in this booklet  
carefully before using your SEIKO Automatic Diver’s Watch. Please  
keep this manual handy for ready reference.  
Usted es ahora un honrado poseedor del reloj de buceador automatico  
SEIKO Cal. 7S26. Para obtener de él los mejores resultados, lea las  
instrucciones del presente folleto con cuidado antes del uso de su reloj  
de buceador automatico SEIKO. Guarde este manual para fácil referencia.  
 
SEIKO AUTOMATIC DIVER’S WATCH  
Cal. 7S26  
Minute hand  
Hour hand  
Day and date  
Rotating bezel  
MON 15  
a
b
c
d
Second hand  
Crown  
a: Screwed-in position  
b: Normal position  
c: First click  
d: Second click  
3
 
FEATURES  
200 METER WATER RESISTANCE  
SCREW DOWN CROWN  
TIME/CALENDAR  
Suitable for scuba diving  
ROTATING BEZEL  
Hour, minute & second hands  
Elapsed time measurement during  
diving (up to 60 minutes)  
Date  
Day  
REMARKS ON LUMINOUS PAINT  
Your SEIKO Automatic Diver’s Watch uses promethium-147 as the active ingredient in the  
luminous paint.  
The use of radioactive materials such as promethium-147 is strictly regulated by  
Japanese Law and monitored by the Japanese Science and Technology Agency. SEIKO  
luminous watches, manufactured in accordance with the law, contain an approved  
amount of promethium-147 harmless to human beings. The amount of radiation they  
emit also conforms to the standards specified by the US Nuclear Regulatory Commission.  
NOTE: Japanese regulations on the use of radioactive materials enforced by the Japanese  
Science and Technology Agency are equivalent to or even stricter than similar  
regulations of the IAEA and ISO.  
 
4
HOW TO START THE WATCH  
This is an automatic mechanical watch.  
To initially start your watch:  
Swing it from side to side in a horizontal arc for about 30 seconds.  
* If the watch is worn on the wrist, the mainspring will be wound automatically through normal wrist  
movement.  
5
 
TIME/CALENDAR SETTING  
Unlock the  
crown by  
turning it  
Pull out the  
crown to the  
first click.  
Set the previous  
day’s date.  
Set the previous  
day of the week.  
3
1
2
4
counterclockwise.  
MON 15  
2
3
1
4
 
6
Pull out the  
crown to the  
second click.  
Turn the hands  
until the desired  
date and day  
appears.  
Set the hands  
to the desired  
time.  
Push back the  
crown.  
5
6
7
8
9
Lock the crown  
by turning it  
clockwise while  
pressing it.  
MON 16  
5
6
7
9
8
7
 
ROTATING BEZEL  
The rotating bezel can show up to 60 minutes of elapsed time.  
Turn the rotating bezel to align its Read the number on the rotating  
” mark with the minute hand.  
bezel that the minute hand points  
to.  
1
2
Minute hand  
Start  
Elapsed time  
30 minutes  
have elapsed.  
 
8
PRECAUTIONS  
CAUTION  
Diving is an inherently hazardous form of recreation and it is essential that you  
strictly observe all instructions for use and maintenance of the watch set forth in  
this booklet for safety’s sake. DO NOT ATTEMPT TO DIVE USING THIS WATCH  
UNLESS YOU HAVE BEEN PROPERLY TRAINED IN DIVING.  
Do not use the watch for saturation diving using helium gas.  
BEFORE DIVING  
Check that:  
• the watch operates normally.  
• the crown is locked tightly in place.  
• there are no visible cracks in the crystal or the watch band.  
• the strap or bracelet is securely fastened to the watch case.  
• the buckle keeps the strap or bracelet firmly secured to the wrist.  
• the rotating bezel turns counterclockwise smoothly (the rotation must not be too loose or too tight)  
and the “  
” mark aligns with the minute hand.  
• the time and calendar are appropriately set.  
If there are any malfunctions, we recommend that you contact an AUTHORIZED SEIKO SERVICE  
CENTER.  
9
 
WHILE DIVING  
Do not operate the crown when the watch is wet or in water.  
Take care not to hit the watch against hard objects such as rocks.  
Bezel rotation may become slightly harder in the water but this is not a malfunction.  
AFTER DIVING  
After checking that the crown is screwed in completely, rinse the watch in fresh water, and wash out all  
seawater, soil, sand, etc.  
After cleaning the watch in fresh water, be sure to wipe it thoroughly dry to prevent possible rust on the  
case.  
 
10  
NOTES FOR USING THE WATCH  
HOW TO START THE WATCH  
If the watch is used without being wound up sufficiently, gain or loss of the watch may result. To avoid  
this, wear the watch for more than 8 hours a day.  
TIME/CALENDER SETTING  
Do not set the day between 9:00 p.m. and 4:00 a.m. Do not set the date between 9:00 p.m. and 1:00 a.m.  
Otherwise, it may not change properly.  
If it is necessary to set the date during that time period, first change the time to any time outside it, set  
the date and then reset the correct time.  
To set the exact time, pull out the crown to the second click when the second hand is at the 12 o’clock  
position and push it back in to the normal position in accordance with a time signal.  
When setting the hour hand, check that AM/PM is correctly set.  
The watch is so designed that the date changes once in 24 hours. Turn the hands past the 12 o’clock  
marker to determine whether the watch is set for the A.M. or P.M. period. If the date changes, the time  
is set for the A.M. period. If the date does not change, the time is set for the P.M. period.  
When setting the hands, first set them to a time a few minutes earlier than the correct time, and then  
advance them to the exact time.  
It is necessary to adjust the date at the end of February and 30-day months.  
ROTATING BEZEL  
For safety’s sake, the rotating bezel rotates only counterclockwise, so that the time measured is never  
shorter than the actual elapsed time.  
11  
 
TO PRESERVE THE QUALITY OF YOUR WATCH  
Repair of diver’s watches requires special expertise and equipment. If you find that your diver’s  
watch is malfunctioning, therefore, never attempt to repair it but immediately send it to a nearby  
SEIKO Service Center.  
TEMPERATURES  
Your watch works with stable accuracy within a temperature range of 5° C and  
+60°C  
35° C (41° F and 95° F).  
Temperatures over 60° C (140° F) or below -10° C (+14° F) may cause a  
-10°C  
slight time loss or gain or shorten the duration within which the watch keeps  
operating. However, the above conditions will be corrected when the watch  
returns to normal temperature.  
PERIODIC CHECK  
MAGNETISM  
CHEMICALS  
2 - 3  
Years  
N
S
Your watch will be  
adversely affected by  
strong magnetism. cosmetic spray, detergents,  
Keep it away from  
close contact with  
magnetic objects.  
It is recommended that the watch  
be checked once every 2 to 3 years  
by an AUTHORIZED SEIKO DEALER  
or SERVICE CENTER to ensure that  
the case, crown, gasket and crystal  
seal remain intact.  
Be careful not to expose the  
watch to solvents, mercury,  
adhesives or paints. Otherwise,  
the case, bracelet, etc. may  
b e c o m e  
d i s c o l o r e d ,  
deteriorated or damaged.  
 
12  
CARE OF CASE AND  
BRACELET  
PRECAUTION REGARDING  
CASE BACK PROTECTIVE FILM  
SHOCKS &  
VIBRATION  
To prevent possible rusting Be careful not to drop If your watch has a protective film  
of the case and bracelet, wipe your watch or hit it and/or a sticker on the case back,  
them periodically with a soft against hard surfaces.  
dry cloth.  
peel them off before using your  
watch.  
SPECIFICATIONS  
1
2
3
4
5
6
Vibrations per hour ............................................ 21,600  
Operational temperature range ......................... –10° C ~ +60° C (14° F ~ 140° F)  
Driving system .................................................. Self-winding type  
Jewels ............................................................... 21 jewels  
Magnetic resistance .......................................... 4,800 A/m (60 gauss)  
Water resistance ............................................... Water resistant up to 200 meters  
The watch is suitable for scuba diving.  
* The specifications are subject to change without prior notice for product improvement.  
13  
 

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