Eco-Drive One

The line between design and technology just got a lot thinner. At just 2.98mm* thin, the Limited Edition CITIZEN® Eco-Drive One expresses the values of Eco-Drive technology with maximum simplicity and is the world’s thinnest light-powered watch. The well thought out design of this timepiece is reflected in the detail of the watch components, with 85 components in a movement 1.00mm thin. This timepiece features a rose gold-tone accented cermet case using a combination of ceramic and metal with a binderless cemented carbide bezel to ensure superior hardness, and resistance to corrosion and oxidation, a black genuine crocodile leather strap, a black sapphire dial, and an anti-reflective sapphire crystal. Production limited to 800 pieces globally. *Dimensions are nominal. Actual product size may be up to .22mm thicker.



  • Movement: Limited Edition, Eco-Drive 8826
  • Functions: 2-Hand
  • Band: Black Genuine Crocodile Strap, Buckle
  • Case Size: 39mm
  • Case Material: Two-Tone Rose Gold-Tone Cermet and Binderless Cemented Carbide
  • Dial: Sapphire
  • Crystal: Anti-Reflective Sapphire Crystal
  • Water Resistance: WR  / Face-washing, Sweat, Raindrops, etc.




“Wearing the Eco-Drive One is a unique experience – both positive and at times mentally unnerving. I say the latter because even though you are wearing a watch, it is so thin that it is easy to forget you are wearing a watch. Forget the relatively light weight of the comfortable, mostly steel case and bracelet, and think about what it feels like to wear a more average-sized watch all the time, and then looking to your wrist and perceiving that no watch case is there! At least that is how the Eco-Drive One looks. It just feels so impossibly thin, your brain doesn’t register the case as even being there.”



“The “one” in Citizen Eco-Drive One refers to the one millimeter thick movement. This movement is made entirely in-house and it can run for 10 months on full charge before needing sunlight. In comparison, the Crystron could only run for 10 days on full charge.

However, don’t let the size fool you; this watch is durable. The limited edition version uses Cermet, a ceramic and metal composite, for the case and a tungsten carbide bezel. These materials are built to last with added strength and durability making this watch both practical and wearable. Continuing the trend of long-lasting materials, the three other versions use a stainless steel case and a Cermet bezel.”



“The fact that Eco-Drive One watches can be as thin as they are has a lot to do with the fact that the solar cell is ring-shaped, and can be placed in the same plane as the gear train for the hands. Every part of the watch was designed specifically for thinness, and each part had to be less than 1mm thick. The motor coil was redesigned for the Eco-Drive One, to reduce its thickness to less than 1mm, and it is set directly into the mainplate. The dial is synthetic sapphire (as is the crystal) and just 0.15mm thick. The rechargeable backup cell was specially developed in partnership with Hitachi Maxell, specifically for the Eco-Drive one; the 3.7 volt cell is only 0.87mm thick. And, because of the very tight tolerances, these are actually hand-assembled watches.”



Citizen ECO-DRIVE ONE is available in the Philippines: 

  • Citizen Shop SM Makati
  • The Watch Store SM Cebu
  • Tempus Centrio Mall
  • Montre SM North Edsa The Annex
  • No Curfew (SM City Lipa, SM City Cagayan De Oro, SM City Davao, SM City Iloilo, KCC Mall of Gensan, and Ayala Center)



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