Precautions; Specifications - Citizen B51 Instruction Manual

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13. Precautions

CAUTION:
Water-resistance performance
There are several types of water-resistant watches,
as shown in the following table.
The unit "bar" is roughly equal to 1 atmosphere.
Indication
Case
Dial
(Case back)
WATER
No indication
RESIST (ANT)
WATER
WATER RESIST
RESIST (ANT)
5 bar or no indication
5 bar
WATER RESIST
WATER
10/20 bar
RESIST (ANT)
or no indication
10/20 bar
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Specifications

Minor exposure to water
(washing face, rain, etc.)
Water-resistant to 3
OK
atmospheres
Water-resistant to 5
OK
atmospheres
Water-resistant to
OK
10/ 20 atmospheres
For correct use within the design limits of the watch, confirm the level of water-
resistance of your watch, as indicated on the dial and case, and consult the table.
Examples of use
Moderate exposure to
Marine sports
water (washing, kitchen
(skin diving)
work, swimming, etc.)
NO
NO
NO
OK
OK
OK
Operation of the
Scuba diving
crown or button with
(with air tank)
moisture visible
NO
NO
NO
NO
NO
NO
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