Citizen is celebrating 40 years of its Eco-Drive technology with an incredible feat of engineering that is the thinnest light-powered watch in the world. The flagship Eco-Drive One packs 85 components that join together to create an insanely thin 1mm movement that can power the watch for about 10 months on a full charge. 

The watches will be available in four models including an 800-piece limited edition ($6,000) that is housed inside a 2.98mm case that is constructed out of cermet, a ceramic and metal hybrid that wraps around a cemented carbide bezel. It will also be available in stainless steel options ($2,600) with cermet bezels and all the models feature anti-reflective sapphire crystals. 

$2,600-$6,000, citizenwatch-global.com

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