Citizen is one of the leading manufacturers of light-powered quartz watches. Its Eco-Drive system was revolutionary when it debuted in 1995 – for the first time, solar powered watches had been made in which the solar cells could be hidden behind the dial, and thus be virtually invisible. The advantages are obvious: a watch whose design aesthetics and legibility aren’t compromised, that doesn’t have a battery to go flat. One of the most practical uses of such a system is in tool watches, and with the introduction of the Eco-Drive Professional Diver 1,000M, Citizen’s made a light-powered dive watch with the most extreme depth rating yet.
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