Citizen 901 User Manual

1
English
To determine the movement number
Your watch features a case number engraved on the case back (refer to figure to the right).
The first four characters of the case number represent the movement caliber number of the watch.
In the example on the right, “1234” is the movement number.
Thank you for your purchase of this Citizen watch. Before using the watch, read this instruction manual carefully to ensure
correct use. After reading, be sure to store this manual in a safe place should it be needed
for future reference.
Engraving position example
The engraving position may differ depending on watch model.
2
Safety precautions
This manual may contain certain safety advisories. Your watch should be used in accordance with these advisories at all times to ensure optimal enjoyment of your watch and to prevent injury to yourself, other persons and/or damage to property.
■ Safety advisories are categorized and depicted in this manual as follows:
WARNING
May cause serious injury or death
CAUTION
May or will cause minor or moderate injury or damage
■ Important instructions are categorized and depicted in this manual as follows:
Warning (caution) symbol followed by instructions that should be followed and/or precautions that should be observed.
3
English
Table of contents
Setting the time and date .................................................................. 4
Mainspring ........................................................................................... 6
Mechanical watches ............................................................................ 8
Water resistance ................................................................................ 10
Precautions and usage limitations ................................................ 13
Maintenance ...................................................................................... 21
Specifications ..................................................................................... 22
4
Date
Crown
Setting the time and date
• When the screw down crown is equipped on your model, loosen the screw before operation. After operation, return the crown to the normal position and tighten it.
• When the watch stops, turn the crown to the right (clockwise) in position 0 to wind the mainspring manually.
• The illustrations in this instruction manual may differ from the actual watch.
Hour hand
Minute hand
Second hand
5
English
While the hands indicate between 8:00 PM and 2:00 AM:
Do not perform steps 1 and 2; otherwise, the date may not change properly. If you want to perform the steps, first turn the crown in position 2 to move the hands so they are not indicating between 8:00 PM and 2:00 AM.
1. Pull out the crown to position
1
.
2. Turn the crown to the right (clockwise) to set the date to one day before the date you
want to set.
3. Pull out the crown to position
2
.
4. Turn the crown to the right (clockwise) to set the date.
• The watch indicates morning when the date changes.
5. Turn the crown to set the time.
• To set an afternoon or evening hour, turn the hands to 12:00 first, then set the time.
6. Push in the crown to position
0
.
• The date is based on a 31-day calendar. Adjust the date on the 1st day after months which have 28/29/30 days.
6
Mainspring
This watch runs using the power of the mainspring.
• Once the mainspring is wound fully, it will run for about 42 hours.
• Sufficient winding ensures stable and accurate movement.
About winding the mainspring
This watch is an automatic mechanical watch. (You can also wind the mainspring manually.) The mainspring is wound by swinging your arm. It is recommended to wear the watch for more than 8 hours a day. If you do not move your arms much in your daily life, for example you spend a lot of time sat at a desk, the mainspring may not be wound sufficiently. In such cases, wind the mainspring manually (see page 7).
7
English
Winding the mainspring manually
Turn the crown to the right (clockwise) in position 0.
Crown
• When the watch stops, turning the crown about 40 times will wind the mainspring fully.
• When the mainspring is wound fully, turning the crown further does not damage the mainspring.
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