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2. Solar-powered watch - Wikipedia

   en.wikipedia.org/wiki/Solar-powered_watch

   Some of the early solar watches of the 1970s had innovative and unique designs to accommodate the array of photovoltaic solar cells needed to power them (Synchronar, Nepro, Sicura and some models by Cristalonic, Alba, Rhythm, Seiko and Citizen). In 1996, Citizen started to sell analog light-powered watches under the Eco-Drive name. [2]

3. Automatic quartz - Wikipedia

   en.wikipedia.org/wiki/Automatic_quartz

   The first such watch was released in Germany in January 1988 and April of the same year in Japan (under the name Auto-Quartz). [3] The watches had an average monthly rate of ±15 sec and provided 75 hours of continuous operation when fully powered. Early automatic quartz movements were called AGS (Automatic Generating System).

4. Casio Edifice - Wikipedia

   en.wikipedia.org/wiki/Casio_Edifice

   Edifice watches range from basic chronograph to more advanced models with more computerised movements. Many Edifice watches utilise Tough Solar, Casio's brand name for solar powered batteries. More advanced models are "Waveceptors" which can calibrate themselves with atomic clocks via radio waves. Some models have Bluetooth connectivity which ...

5. Eco-Drive - Wikipedia

   en.wikipedia.org/wiki/Eco-Drive

   The technical platform that made the Eco-Drive concept possible was the Eco-Drive caliber 7878 movement. This movement was the first light-powered movement where the solar cells could be mounted under the dial. Previous light powered watches from Citizen and other manufacturers had the solar cell(s) mounted directly on the dial.

6. 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 ...

7. List of Swiss watch manufacturers - Wikipedia

   en.wikipedia.org/wiki/List_of_Swiss_watch...

   Swiss watch brand Christelle Rosnoblet (CEO) Squale Watches: 1959 Neuchâtel: Charles von Büren Chiasso: Andrea Maggi, Massimo Maggi Swatch: 1983 Biel: Subsidiary: The Swatch Group: Nick Hayek Jr. (chairman, president) TAG Heuer: 1860 [1] Saint-Imier [1] Edouard Heuer [1] [2] La Chaux-de-Fonds: Wholly owned subsidiary: LVMH: Frédéric Arnault ...