3 new Citizen Eco-Drive watches with the Caliber 0100: world’s most precise watch

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CITIZEN introduces “Caliber 0100” – New Eco-Drive watches featuring the world’s most accurate time-keeping of within ±1 second per year. ― Three new models with limited quantity worldwide*3 ―

Slated for launch in the autumn of this year, CITIZEN unveils three new “Caliber 0100” watches, named after the EcoDrive movement, that delivers the world’s most precise time-keeping accuracy of within ±1 second per year.

For over 40 years, CITIZEN has pursued higher precision always with Eco-Drive. Since the advent of quartz watch technology in the 1970s, CITIZEN was quick to understand the shortfalls of quartz watches, namely the relatively short battery life, the inconvenient process of replacing batteries, and most importantly the environmental issues of battery disposal.

AQ6010-06A ,18K White gold, Limited edition of 100

In the search for a better way to power watches, CITIZEN began developing a new method using the limitless energy of light. Eco-Drive light-powered technology became the premier heart of the brand and light has remained its core inspiration for more than four decades of constant improvement. Light is available anywhere in the world, and exemplifies CITIZEN’s philosophy of contributing to society and using its manufacturing prowess to enlighten citizens of the world.

This year marks its new century, with CITIZEN pushing technologies to extreme limits of precision time-keeping to a world’s first accuracy of ±1 second per year. “Caliber 0100” represents its most innovative drive movement and the brand’s drive to evolve watch manufacturing to a new world-leading level

Quest for the perfectly pure second

“Caliber 0100” autonomously calibrates time at an ultra-high accuracy of ±1 second per year internally without relying on data from radio towers or satellites. A single second measurement from this movement is exponentially more accurate than other watches, measuring each second at its most precise and authentic reading.

The Citizen Caliber 0100 – precision of 1 second a year is currently the best in the world.

In order to achieve such unprecedented accuracy, “Caliber 0100” utilises AT cut type crystal oscillators rather than traditional tuning fork-shaped crystal oscillators most often used in quartz watches. AT cut type crystal oscillators vibrate at a frequency of 8.4 MHz (8,388,608 Hz), which is more than 250 times higher than tuning forkshaped crystal oscillators. This ensures that this new mechanism remains resistant to outside influences such as temperature fluctuations and effects of gravity, as well as age degradation.

AT cut crystal oscillator is used in place of the tuning fork-shaped one used in most quartz watches.

AT cut type crystal oscillators, however, require greater amounts of energy to operate. CITIZEN was able to compensate for this by thoroughly vetting materials used, intelligent designs, and refined control over its powersaving strategies. “Caliber 0100” technology allows Eco-Drive to run continuously and is significantly more stable for up to six months on a single full charge (8 months on power save mode), even without the presence of a light source.

What’s more, “Caliber 0100” maintains its greater accuracy by continuously monitoring and adjusting for frequency and temperature shifts once every minute. The optimal running temperature is between 5°C to 40°C, which is considered the most practical watch temperature environment for most regions of the world.

AQ6021-51E, Super Titanium (Duratect α), Limited edition 500 pieces

A new circuit design also includes higher shock resistance, which automatically corrects positions of the watch hands, and an antimagnetic feature protecting the movement from effects of magnetic force. All these innovations combine to deliver an unprecedented ±1 second per year precision accuracy.

The “Caliber 0100” expresses the beauty of individual seconds in its purest form as well as represents CITIZEN’s bold direction to “pursue the true essence of a watch.” Superfluous adornments have been minimised to produce the ultimate simplicity.

Precision means the second hand is in perfect alignment to each index marker. All the time.

Among the most impressive characteristics is the perfect alignment of the second hand and indices when viewed from the front. Individual hand movements are the physical expression of a “second in its purest form,” achieved by adopting the LIGA fabrication process*4 (a fabrication technology for making high-aspectratio microstructures) for individual components. Ordinarily, gears and springs are machine cut and pressed. With LIGA fabrication, more intricate components can be manufactured. Special components made by combining customized springs and gears processed by LIGA fabrication prevent even the smallest inconsistencies of gears to control hand movements, and enables hands to align perfectly with the indices.

Components are made in the Citizen manufacture using LIGA technology.

For the watch hands, heavy and long brass elements are utilised, which ordinarily cannot be propelled with traditional torque motors of quartz movements. The simple aesthetics of the exquisite brass hands featured in these new models reflect the design concept of “conveying the purity of every second with superb accuracy.”

The brass seconds hand is hand curved to reduce parallax error.

CITIZEN’s own skilled watch-making meisters are responsible for assembling “Caliber 0100.” These master crafts people oversee and ensure the highest quality and accuracy of the brand’s watches. They are also entrusted to ensure precision alignments of the second hand with each of the 60 indices once it is set in.

AQ6020-53X, Super Titanium (Duratect α), Mother of pearl dial. Limited edition of 200 pieces

Crafting components with such intricate precision and delicate hand movements are hallmarks of CITIZEN as a true manufacture d’horloge rie. These new models featuring “Caliber 0100” epitomise CITIZEN’s strict quality manufacturing and perpetual innovation of Eco-Drive watches.



  1. These models are possibly going to be in the Times Square Store in New York City. If you want to hear about release info on these watches please contact me.