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The Case and Dial
Super Titanium™ is CITIZEN’s proprietary engineered material that takes solid titanium and treats it with Duratect α *5, leaving a material that is 40% lighter than stainless steel, with a surface more than five times harder. Protected by a sapphire crystal, the watch is hypoallergenic and resistant to rust, scratching and water, achieving a perfect balance between strength, sleek design and daily comfort. The watch measures 36.5 mm in diameter with a thickness of 3.53 mm. Its limited edition variant in Altic and Carbide case measures 37 mm wide and 2.98 mm thickness.
With a 1.00mm thick movement and a 2.98 mm case, Eco-Drive One is the world’s thinnest light-powered watch. The dial of Eco-Drive One is made of sapphire crystal just 150 microns thick. Possibly for light transparency, the sapphire dial allows light to pass through to the solar receptors."