Eco-Drive One

Eco-Drive One embodies our philosophy of “Better Starts Now”—the simple belief that it is always possible to make something better, and that now is the time to start doing it.

Eco-Drive One Line up

The essence of the wristwatch

Throughout our history, we have sought to make watches that people everywhere will relate to and love. Expressing the values of Eco-Drive with maximum simplicity just reflects what CITIZEN has always been about.
In the Eco-Drive One we have created the world’s thinnest light-powered watch. It is everything a watch should be—a beautiful, highly wearable object that keeps running

A thin and elegant watch that feels fantastic on the wrist, Eco-Drive One is a unique timepiece created to mark a major milestone: 40 years of Eco-Drive.

And now for the next challenge…

1,00 mm Movement

85 components… in a movement just 1.00 mm thick

Developing Eco-Drive One was a journey into the world of microns. Just 1.00 mm thick, the movement contains 85 components, packed together with cell-like intricacy.

We used techniques like getting single components to perform dual functions and rebuilding the rotor and coil from scratch to turn conventional watchmaking on its head and create something revolutionary.

Left normal rotor of a watch compared to the rotor of the Eco-Drive One

The name Eco-Drive One comes from the movement being just 1.00 mm thick. Just one millimetre, it’s still jam-packed with all CITIZEN’s ingenuity and passion. Unconventional materials for thin.

Video about the rotor

Video zur Spule

Video zum Akku

Materials to achieve 2.98 mm

Unconventional materials for thinness and strength

The thinner a watch gets, the more beautiful it becomes. The only problem is: Will it be strong enough?
The Eco-Drive One models use new materials that offer both thinness and strength.

Video about case design

Flaggschiff-Modell (Limited Edition)

Gehäusematerial: Cermet
Lünette Material: Binderless cemented carbide


Gehäusematerial: Edelstahl (Duratect)
Lünette Material: Cermet

Materials Comparison


The Eco-Drive One uses just 150 microns thickness of sapphire crystal for its dial, as a material capable of sustaining its thinness as well as its beauty.

Watch assembly

CITIZEN’s devotion to craftsmanship

85 components are assembled by the hands of CITIZEN master craftsmen to form 1.00mm thick movement, and a ultra-thin and elegant Eco-Drive watch with 2.98mm case is realized by their skilled technique.

National Geografik – Jap. Video mit engl. Untertitel

CITIZEN’s devotion to craftsmanship is evident in the way that nearly every single component, from the gears on up, and even watch assembly process were specially made for this model.

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