Global Network


May 22, 2014

Eco-Drive watch with dual sensors for electronic compass and altimeter available from mid-May 2014*1

CITIZEN proudly announces the Eco-Drive*2 ALTICHRON CIRRUS. This newest watch in the PROMASTER line features dual sensors for an electronic compass and altimeter. It launched in mid-May 2014 and is available in two designs — titanium and pearl-white titanium. PROMASTER is CITIZEN’s world-renowned brand long held in the highest regard by professionals for supreme durability, superior functionality, as well as the ability to capture the imagination.

First marketed in 1989, the original ALTICHRON was a groundbreaking CITIZEN watch featuring superior altimeter functions that became one of the hallmark models of the PROMASTER brand. This new model builds on the ALTICRHON tradition, adding the latest CITIZEN technologies, such as Eco-Drive technology that powers the watch using any light source. These enhancements along with a sophisticated design that plays to the wearer’s spirit of adventure — which won the Good Design Award*3 2013 — make this watch worthy as a CITIZEN flagship model.

The altitude and depth measuring capability reaches as much as 10,000 meters, higher than any mountain on the planet, and as deep as 300 meters below sea level. Rather than displayed digitally in an LCD, all the information regarding altitude or direction is shown as an analog representation, making it possible to keep time display as the main function. The color and shape of the hands are designed to make it easy for a wearer to read multiple types of information at a glance. For example, colors for indexes on the dial and hand are coded by function. In spite of its sophisticated capability to display a complex array of information, once a user understands how to read the watch operation becomes very easy.

A striking three-dimensional sense of depth makes the dial look even more captivating. Inside you can clearly see floating indexes and the hands beneath the transparent dial, suggesting sky with clouds floating at different heights above land. At first glance the watch resembles aircraft and helicopters ascending to greater heights. The rounded streamline design of the case simulates jet streams and the arc of the earth seen from the great heights. The overall allure of this watch comes from the image of high altitude and the sky in its details. All of this combines to embody the liberation you feel when you venture wherever your imagination takes you.


*1: Timing of the launch differs according to country.

*2: Eco-Drive is CITIZEN’s proprietary technology that powers watches using any natural or artificial light source, eliminating the need for batteries.

*3: The Good Design Award has been a sole comprehensive design evaluation and commendation system in Japan since 1957. Many companies and designers from both inside and outside of Japan participate in the activity to enhance the industry of quality of light through the design. “G Mark,” the symbol of the award has been recognized widely as a mark representing good design, and about 1,000 items are approved each year, or about 38,000 in total over the last 55 years.

The dial currently indicates:
3,830m in altitude
Southeast as the compass direction (between 4 o’clock and 5 o’clock)

Product features

  • ■ Altimeter delivers an operational range from 300 meters below sea level to 10,000 meters of elevation, and electronic compass measures geomagnetism with built-in magnetic sensor to determine the direction.
  • ■ Can display direction or altitude simultaneously with the time.
  • ■ At the push of a single button, direction can be displayed while measuring depth and elevation.
  • ■ Vividly colored indexes and hands ensure precise visibility.
  • ■ Watch case finely crafted from CITIZEN’s exclusive titanium materials
  • ■ The wavelike shape of the side view owes its inspiration to jet streams, which adds an accent to the round case.


Since 1989, PROMASTER has been highly acclaimed for its supreme durability in even the harshest environments and for its superior functionality in a wide variety of specialized fields. It has been categorized as “LAND” for climbing mountains, “MARINE” for diving into the sea, and “SKY” for flying in the sky. Each category prepares three levels as Standard, Expert and Premier to meet the demands of all types of users from beginners to professionals. From 2013, the renewed PROMASTER extends its bold legend by infusing “imagination” into its persona, reflecting aspirations toward exploring infinite new territories.

Technical Details

Ref BN4035-08E BN4034-01E
Image BN4035-08E BN4034-01E
Limited Number 500 Pieces Worldwide
Case Material Titanium + DLC*4 Titanium+ DLC,
Pearl-White Coating
Band Material Polyurethane
Dial Color Black
Crystal Sapphire with Anti-Reflective Coating
Case Diameter / Thickness 51.0mm / 18.0mm (designed value)
Main Functions J280 <Eco-Drive>
• Accuracy of ± 5 Seconds per a Month
• Altimeter (-300m to 10,000m)
• Electronic Compass
• Power Reserve Indicator
• WR20

*4: DLC (Diamond Like Carbon): Coated with an amorphous carbon film that is nearly as hard as diamond.

The final design and specifications are subject to change without notice.