The challenge for Citizen was to integrate the Eco-Drive technology into a model with a case thickness of only 4.5 mm. In order to achieve this, the solar cell was placed underneath the indices around the module instead of placing it between the dial and the memory module.
The result is not only technically convincing, but also in visual terms. Classically elegant watches with an ultra-flat case rounded off by elegant leather straps or a metal strap that lies perfectly on the wrist. Clearly designed dials with fine indexes or Roman or Arabic numerals optimally protected by scratch-resistant sapphire crystal.