Technical information

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WHAT KIND OF CRYSTALS ARE USED?
The majority of Citizen watches have high quality mineral glass crystals which are 3 times harder than
plain glass. In addition, many Citizen watches feature sapphire crystal which is surpassed only by
diamonds in hardness. This synthetic sapphire ranks high in hardness, heat resistance and corrosion.
HOW IS A CERAMIC WATCH MADE?
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Zirconium oxide powder is homogenized and molded into links.
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These links are then sintered in a furnace at very high heat. This process reduces
the size of the links and strengthens them.
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Next, the links are polished by diamond files until they are smooth and then
assembled into a watch bracelet.
WHAT ARE THE FEATURES AND BENEFITS OF
CERAMIC WATCHES THAT MAKE THEM SO SPECIAL?
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Durability – On the Vickers scale of hardness ceramic is harder than gold, platinum and steel
resulting in a product that is more scratch resistant than these precious metals.
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Thermal Constancy – Ceramic products are used to protect rockets for space travel.
It benefits consumers by providing a product that adapts to your body temperature.
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Color Carrier – The ceramic manufacturing process results in a colored link that will
not fade or discolor.
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Hypoallergenic – Ceramic products are used for surgical procedures because of their hypoallergenic
properties. Wearing a ceramic watch is a benefit for those consumers who have skin allergies.
FREQUENTLY ASKED QUESTIONS
HOW DO YOU DETERMINE WATER RESISTANCE?
There are several different levels of Water Resistant watches in the Citizen Watch collection. The water
resistant quality of your timepiece is outlined in the chart below. Compare your timepiece against the chart
to ensure use befitting its water resistant characteristics.
“WATER RESISTANT” may sometimes be abbreviated to “WATER RESIST” or “WR”
DO NOT OPERATE CROWN OR PUSHERS IF THE WATCH
IS WET OR WHILE IN WET ENVIRONMENTS.
Always be sure the crown is in the closed position next to the case.
If your model features a screw-down crown, be sure it is screwed in completely.
O: indicates “OK”
X : indicates “AVOID”
Indication
Dial Caseback Water Resistant Characteristics
No Indication —
Not a water resistant timepiece and
must be kept away from water.
X X X X
Water Resistant Water Resistant
An ordinary water resistant timepiece and can
withstand sweat, rain drops, etc. in daily use.
O
X X X
WR50 or
Water Resistant 50
Water Resistant
5 Bar
Suitable for ordinary use and still
water swimming (pool).
O O
X X
WR100/200 or
Water Resistant
100/200
Water Resistant
10/20 Bar
For frequent use with water, it is not specially
designed for scuba diving.
O O O
X
200M (or deeper)
Water Resistant
200M (or deeper)
For skin diving and scuba diving (aqualung diving).
Usable up to the respective indicated depths.
O O O O
Water-Related Use
Face-washing,
Sweat,
Raindrops, etc.
Swimming
etc.
Marine
Sports
(skin diving)
Scuba Diving
(with air tank)