In the following year, CITIZEN invented the world’s first analog quartz watch powered exclusively by light, known as Eco-Drive, and the company’s expertise in watchmaking has continually evolved through its advanced proprietary R&D pipeline, which has led to further advancements in accuracy and longer running time.įor the Cal.0100, CITIZEN designed an original AT-cut quartz oscillator for watches, which minimizes effects that hinder accuracy caused by changes in temperature and gravity. The achievement mirrors past breakthroughs, including CITIZEN’s 1975 release of the “Citizen Crystron Mega,” which at the time was the first quartz watch with accuracy of ☓ seconds per year. It offers precise timekeeping, autonomously and continuously, and reliant solely on the watch’s internal mechanism to deliver precision and reliability. The Cal.0100 boasts an accuracy of ☑ second during a span of one year-making it the world’s most accurate Eco-Drive movement to date. Since its foundation in 1918, CITIZEN has continued its pursuit of the essence of timekeeping, always challenging new possibilities, while pushing the boundaries of watchmaking technology as a true manufacture d’horiogerie.
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