KEY MESSAGE:

GO BEYOND.

THE THREE VALUES

Functionality enabled by innovative technology to inspire people to push boundaries.

Durability to withstand extreme environment that gives people the confidence to take on new challenges.

Safety assured by elevated quality and specs that make PROMASTER the ideal partner for people who challenge their limits.

The Eco-Drive Professional Diver 1000m is ISO compliant diver’s watch that can performs even in saturation diving environment. The escape valve set at 10 o’clock on the case side releases the helium gas that enters the watch during saturation diving to prevent any damage or rupture upon the movement.

There is no need for regular battery replacement thanks to the Eco-Drive technology. The Power Reserve Indicator tells divers the remaining battery charge so that they can enjoy diving worry free.

To achieve an even higher practical functionality, CITIZEN conducted validation and vilification testing with cooperation of JAMSTEC *7 (Japan Agency for Marine-Earth Science and Technology), the research authority in Japan, to conduct a leak test and examine the effects of high water pressure to check waterproof performance in a high-pressure environment as well the dial visibility, and luminous features in deep waters.

3 key factors that cement the trust in the diver’s watch

Unidirectional bezel/ Bezel-locking mechanism

We made the bezel of the PROMASTER unidirectional in line with the ISO standard for diving watches. This improves safety by eliminating the danger of a diver accidentally turning the bezel the wrong way during a dive. The Eco-Drive Professional Diver 1000m model is equipped with a bezel-locking mechanism.

Luminous hands and dial for high visibility

PROMASTER’s photo-luminescent markings absorb light fast and stay bright for a long time. We made sure that a generous proportion of the hands is coated in luminous material and tested a range of colours before selecting the most visible ones. The luminous materials used for this model has more than twice the afterglow brightness than a conventional material even after 5 hours. We use the material which does not contain any radioactive material.

Warning Colour

When the bezel lock is set to FREE, the orange warning colour is appeared to warn the user. The crown also has a same mechanism, revealing an orange colour between the case and the crown to tell the owner when the crown is not correctly pushed into a lock mode.

Culmination of the expert technologies that achieve high durability and water resistance function

A diver’s watch that performs with 1,000m saturation diving must not only pass the water resistance test, but also a test to keep performing for 15 days in a pressurized chamber that contains helium and oxygen or even 100% helium gas and then revert back to atmospheric pressure within 3 minutes after high-speed decompression. The pressure is an unimaginable 125 barometer which demands high durability and water resistance function. This is a world’s first as a light powered watch.

CITZEN’s proprietary titanium material, Super Titanium™*8 has various surface-hardening technology which is expertly used to offer the functions required for each of the parts to collectively achieve a robust surface finish. In order for the adjoining sections of the parts to also withstand the water pressure at 1,000 metres depth, we applied one of the hardening technology, “Duratect*9 MRK” to the case when parts like the crown tube and the escape valve tube were already in place, we bonded the individual components to the case at the atomic level to achieve a higher level of adhesion. (The technical name for the process is “solid phase diffusion bonding.”) The result was not just a tougher case surface, but durability capable of withstanding 1,000 metres of water pressure.

[Product Specification]

[Product Specification]

[Product Specification]