Citizen CB1 Series Instruction Manual page 58

Water resistance
• Non-water resistant watches cannot be used underwater or in environments in contact with water.
• Water-resistance for daily use (to 3 atmospheres) means that the watch may be worn while washing
your face or in the rain, but is not to be immersed in water.
• Upgraded water-resistance for daily use (to 5 atmospheres) means that the watch may be worn
while swimming, but is not to worn while skin diving.
• Upgraded water-resistance for daily use (to 10/20 atmospheres) means that the watch may be worn
while skin diving, but not while scuba or saturated diving using helium gas.
• For a metallic, plastic or rubber watchband, wash any dirt off with water. Remove the small
amounts of dirt trapped between the crevices of the metallic band with a soft brush. If your watch
is not water resistant, be sure not to get the case of the watch wet.
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