Citizen Calibre 0100

In 1975, with the Crystron Mega, Citizen launched the world’s first quartz watch accurate to ± 3 seconds per year. It then went on to embrace light-powered technology in the form of the Eco-Drive to produce highly accurate timepieces. This year, for its 100th anniversary, Citizen drew on this experience to achieve yet another milestone: a quartz calibre with an annual accuracy of… ± 1 second! The extraordinary Calibre 0100, which runs at a frequency of 8.4 MHz, is a prototype and has been presented in a pocket watch. We might, however, see first applications as of next year!