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2. Eco-Drive - Wikipedia

   en.wikipedia.org/wiki/Eco-Drive

   According to Citizen, by 2011 80% of their wristwatches featured Eco-Drive, and the company saw Eco-Drive type watches as the focus of new generations of watches. [ 20 ] In 2012 Citizen offered over 320 Eco-Drive watch models in various types, styles and price ranges.

3. Citizen Watch - Wikipedia

   en.wikipedia.org/wiki/Citizen_Watch

   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 complaints that the device could explode and cause wrist injuries.

4. List of most expensive watches sold at auction - Wikipedia

   en.wikipedia.org/wiki/List_of_most_expensive...

   A Patek Philippe pocket watch. This list of most expensive watches sold at auction documents the watches sold at auction worldwide for at least 1.5 million US dollars.The final price listed is the total price paid by the buyer converted to US dollars, according to the currency exchange rate at the time of auction.

5. Solar-powered watch - Wikipedia

   en.wikipedia.org/wiki/Solar-powered_watch

   In 1996, Citizen started to sell analog light-powered watches under the Eco-Drive name. [2] Since their introduction, photovoltaic devices have greatly improved their efficiency and thereby their capacity. Watchmakers have developed their technology such that solar-powered watches had by 2009 become a major part of their range. [3]

6. Automatic quartz - Wikipedia

   en.wikipedia.org/wiki/Automatic_quartz

   This model was an attempt to enter higher-priced markets (at a cost of around $1000 USD), but the technology failed to attract consumer interest and Citizen has since stopped making use of the unique movement. No other autoquartz powered watch from Citizen is known; all other Eco-Drive models only use solar power or thermal power. [citation needed]

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 ...