News
New light-powered Eco-Drive*1 Professional Diver 300 m with E365 movement that runs for 365 days on a full charge
CITIZEN’s PROMASTER line of professional sports watches offers superior functionality to ignite the imagination. The latest release from the PROMASTER line-up is the Eco-Drive Professional Diver 300 m equipped with the Cal. E365 movement that can run for an incredible 365 days on a full charge.
CITIZEN PROMASTER Eco-Drive Dive
BN1024-01Z(Left) BN1024-01E(Right)
This new Professional Diver 300 m model, based on the popular CITIZEN PROMASTER Eco-Drive Diver, is a saturation diver’s watch equipped with a helium escape valve and water resistance up to 300 meters. The watch is powered by the Cal. E365 movement that keeps on running for 365 days on a full charge, even in the harshest environments and low-light conditions encountered by divers under the sea. This new model is based on the popular BN0156-05E and inherits many of its distinctive design elements including the crown and crown guard at the 4 o’clock position, the shape of the indices and the hour and minute hands, and the silhouette of the rotating bezel. The glossy dial is inspired by the dark hues of the deep sea with its subtle transition into a deeper shade of color toward the 6 o’clock position, producing a simple yet rugged look. The strap is made of BENEBiOL™*2, a plant-based polyurethane. CITIZEN has adopted BENEBiOL for its straps as it is resistant to hydrolysis when exposed to moisture and has a lower impact on the environment.
An image of a diving helmet is pressed into the case back as a universal symbol recognizable to professional divers everywhere.
An image of a diving helmet is pressed into the case back as a universal symbol recognizable to professional divers everywhere.
Product Specifications
 |  | |
| Brand | CITIZEN PROMASTER / Eco-Drive Diver 300m | |
| Model | BN1024-01E | BN1024-01Z |
| Launch | April 2025 (scheduled) | |
| Case / Band | Stainless steel / Biomass-based polyurethane (BENEBiOL™)/includes strap extension） | |
| Glass | Sapphire glass with anti-reflective coating | |
| Case diameter / thickness | 46.0mm /16.3mm（design specification only ） | |
| Specifications | Cal.E365 /Accuracy of ±15 seconds per month/Eco-Drive runs for one year on full charge ■ ISO-standard diving water resistance to 300 m (Saturation Diving) ■ Luminous (Hands and indices) ■ One-Way Rotating Bezel ■ Screw lock crown ■ Recycled materials used for selected dial components | |
*1 Eco-Drive is CITIZEN’s proprietary technology that powers watches using any natural or artificial light source, eliminating the need to replace batteries. A first withinthe watch industry, Eco-Drive was certified as an Eco Mark product by the Japan Environment Association (JEA) and recognized for its contribution to environmental sustainability.
*2 BENEBiOL™: A biomass-based raw material for polyurethane(polycarbonatediol) developed by Mitsubishi Chemical Corporation. This material is contained in our watch straps as a raw material to achieve better durability and environmental friendliness.
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.
CITIZEN WATCH is a true manufacture d'horlogerie with the capabilities to carry out the entire watch manufacturing process in-house, from creating a watchʼs individual components to its final assembly. The company operates in more than 140 countries 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 have made watches, invented and improved technologies and explored the future of watches such as our proprietary light-powered Eco-Drive technology.
*Eco-Drive and PROFESSIONAL DIVER is trademarks or registered trademarks of Citizen Watch Co., Ltd.
*BENEBiOL™ is a registered trademark of Mitsubishi Chemical Corporation.
*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.