Citizen Eco-Drive One

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Technical specifications


  • Hours
  • Minutes


  • Eco-Drive
  • Manufactured


  • Cushion
  • Stainless steel
  • Brushed
  • 3.88mm
  • 38.00mm


  • Sapphire

Water resistance

  • 5.00atm / 50.00m / 165.00ft


  • Deployment Buckle
  • Stainless steel


  • Stainless steel


  • 2022

Official description

The Eco-Drive One is the thinnest, analog, light-powered watch in the world. This new addition to the collection features a black dial with Duratect Platinum-coated steel for lightweight durability—and takes its design inspiration from luxury sports watches of the 1970s. Powered by the Eco-Drive Calibre 8826, with 12 months of running time, it features an ultra-thin 38mm, one-piece case measuring 3.88mm thick, a sapphire crystal with “Clarity” coating, a hardy 5 bar of water resistance, and a modified pentagonal shape. This collection has since come to define the marriage of advanced, light-powered movement technology and ultrathin watchmaking in the 21st century. When paired to a 0.15mm synthetic sapphire dial and crystal, with a brand-new, rechargeable 3.7V power cell from Maxell, the result was a hand-assembled wonder the likes of which the watch world had never before seen.