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2. Citizen Watch - Wikipedia

   en.wikipedia.org/wiki/Citizen_Watch

   Eco-Drive watches use a battery recharged by a solar panel hidden under the watch face. In the rare and discontinued Eco-Drive Duo series, the solar power was supplemented by an automatic quartz power source. One early model, called the Citizen Vitality, used the watch hands to drive a small electric generator, but was discontinued following ...

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. Tachymeter (watch) - Wikipedia

   en.wikipedia.org/wiki/Tachymeter_(watch)

   Tachymeter scale on a Citizen watch bezel. A tachymeter (pronounced / t æ ˈ k ɪ m ə t ər /) is a scale sometimes inscribed around the rim of an analog watch with a chronograph.It can be used to conveniently compute the frequency in inverse-hours of an event of a known second-defined period, such as speed (distance over hours) based on travel time (distance over speed), or measure distance ...

5. Diving watch - Wikipedia

   en.wikipedia.org/wiki/Diving_watch

   Citizen Promaster Eco-Drive AP0440-14F Diver's 200 m with integrated crown shoulders. Analog diving watches must have a water resistant crown. Some models have the crown mounted in unconventional positions like 4, 8 or 9 o'clock to avert or reduce discomfort from the crown touching the wearers (left) wrist or back of the hand.

6. Talk:Eco-Drive - Wikipedia

   en.wikipedia.org/wiki/Talk:Eco-Drive

   At present Citizen is currently most renowned for their Eco-Drive movement, which allows the watch to be powered by light as opposed to a standard battery (a solar powered watch in other words)." The Citizen Holdings Co., Ltd. article points out that the Eco-Drive line is a commercially successful product line. Tough always subject to personal ...

7. Watch - Wikipedia

   en.wikipedia.org/wiki/Watch

   Some models need only a few minutes of sunlight to provide weeks of energy (as in the Citizen Eco-Drive). Some of the early solar watches of the 1970s had innovative and unique designs to accommodate the array of solar cells needed to power them (Synchronar, Nepro, Sicura, and some models by Cristalonic, Alba, Seiko, and Citizen). As the ...