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2. Citizen Watch - Wikipedia

   en.wikipedia.org/wiki/Citizen_Watch

   Citizen Promaster Automatic NY0040-09EE diving watch. In 1959, Citizen launched the Parawater – Japan's first fully-waterproof wristwatch. It became the forerunner to Citizen's range of dive watches, subsequently (1982) called the Promaster Marine range. Also in 1982, Citizen launched the 1300m Professional Diver's watch – the world's most ...

3. Eco-Drive - Wikipedia

   en.wikipedia.org/wiki/Eco-Drive

   Citizen Eco-Drive Thermo watches were introduced in 1999 and use the temperature difference between the wearer's arm and the surrounding environment as a power source. The rare Eco-Drive Thermo watches use the Seebeck effect to generate thermo electricity that powers the electronic movement and charges the secondary power cell. In the sun or in ...

4. Diving watch - Wikipedia

   en.wikipedia.org/wiki/Diving_watch

   The history of efforts to use watches underwater and to make watches that are water resistant, or waterproof and to make dive watches goes back to perhaps the 17th century. In the 19th century water and dust resistant watches were usually one-off pieces custom made for a particular customer and described as "Explorer's Watches".

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6. Water Resistant mark - Wikipedia

   en.wikipedia.org/wiki/Water_Resistant_mark

   The International Organization for Standardization (ISO) issued a standard for water-resistant watches which also prohibits the term waterproof to be used with watches, which many countries have adopted. This standard was introduced in 1990 as the ISO 2281:1990 and only designed for watches intended for ordinary daily use and are resistant to ...

7. Watch - Wikipedia

   en.wikipedia.org/wiki/Watch

   Such watches are designed for everyday life and must be water-resistant during exercises such as swimming. They can be worn in different temperature and pressure conditions but are under no circumstances designed for scuba diving. [citation needed] [102] The standards for diving watches are regulated by the ISO 6425 international standard. The ...