CITIZEN launched the world’s first light-powered analogue watch in 1976. Now known as Eco-Drive, this innovative technology is celebrating its 50th anniversary in 2026. The PROMASTER line enjoys enduring popularity with watch fans around the world, and CITIZEN is releasing two limited-edition Eco-Drive 50th anniversary PROMASTER models from the SKY and LAND series to commemorate this milestone.

The limited-edition SKYHAWK model from the SKY series features a multi-faceted case design that has proven to be immensely popular in global markets. The yellow-gold colour is inspired by the golden rays of sunrise, and the black dial provides a stylish contrast and bold look unique to this limited-edition model. The watch is equipped with the Eco-Drive Radio Controlled*2 Cal. U680 movement with its distinctive combination analogue/digital display. As a versatile pilot watch, it is packed with features including a 1/100 chronograph and rotating bezel. The 45.7 mm case offers a strong presence on the wrist, and its multifaceted case and clean lines are exclusive to the SKY series.

The limited-edition TSUNO CHRONO model from the LAND series takes design cues from classic cars that were popular when CITIZEN released the world’s first light-powered analogue watch back in 1976. The dark green dial, brown leather strap, and gold-coloured accents combine to create a stylish retro look. The Cal. E210 movement inside offers a mechanism that instantly returns the chronograph hands to zero, a feature often seen in mechanical chronograph watches, in an Eco-Drive quartz model. This limited-edition model combines a classic design with superior functionality.

• *1 Eco-Drive is CITIZEN’s proprietary technology that powers watches using any natural or artificial light source, eliminating the need to replace batteries. Certified as an Eco Mark product for the first time in the watch industry.
• *2 Eco-Drive Radio-Controlled: Eco-Drive is CITIZEN’s proprietary technology that powers watches using any natural or artificial light source, eliminating the need to replace batteries. Certified as an Eco Mark product for the first time in the watch industry. Radio-controlled watches receive signals from radio transmitters to correct the time and calendar automatically.
• *3 Anti-reflective coating:　A multi-layered coating applied to the glass. The coating reduces the reflection of light from the surface of the glass that makes the dial easier to see.
• *4 Perpetual calendar is a fully automatic calendar control function that automatically adjusts the end of each month, including in leap years, until February 28, 2100.

<About PROMASTER>

Since its debut in 1989, PROMASTER has become an icon among professional sports watches, known for superior durability and reliability in extreme outdoor environments on land, at sea, and in the air. The three classifications in the series are designed with high-performance specifications and durability: MARINE - for divers, LAND - for climbers, and SKY - for aviation. PROMASTER is exclusively designed for optimum functionality, durability, and safety, inspiring the imagination of generations of active sports aficionados who push beyond physical and mental boundaries.
https://www.citizenwatch-global.com/promaster/index.html

<About CITIZEN>

CITIZEN WATCH is a true manufacture d'horlogerie with the capabilities to carry out the entire watch manufacturing process in-house, from creating a watch’s individual components to its final assembly and adjustment. The company operates in more than 140 countries and regions around the world. Since its founding in 1918, CITIZEN has held the belief of “BETTER STARTS NOW” — that is, no matter who you are and what you do, it is always possible to make something better, and now is the time to start doing it. Sharing this belief, we began making mechanical watches, invented and improved technologies and explored the future of watches such as our proprietary light-powered Eco-Drive technology and satellite-synchronised timekeeping. 2026 marks the 50th anniversary of the launch of CITIZEN’s world first light-powered watch, and we will continue to explore the future of watchmaking through innovation.

「Eco-Drive 50 YEARS OF INNOVATION」 https://www.citizenwatch-global.com/special/50th-ecodriveinnovation/index.html

• *Eco-Drive is trademarks or registered trademarks of Citizen Watch Co., Ltd.
• *The final design and specifications are subject to change without notice.
• *The availability, specifications, and related information, such as the product code for the models featured in this site, may vary by markets. If you would like to know more details, including the availability of these products in your area, please select your local website from our global site.