Citizen Eco-drive technology combined with atomic timekeeping makes this Citizen Eco-Drive perpetual chronograph with the most accurate watch in the world. Leaders in innovation, Citizen produce some of the most high-tech watches around and fuse their contemporary style with unique form and function to elegantly keep accurate time. Fastened with a black leather strap, the 42mm stainless steel case is rugged and masculine and features a tachymeter scale on the bezel. The black textured dial is protected by non-reflective sapphire glass, and has a sober and authoritative appearance with its silver tone baton hour markers, date window at 4 o'clock, and resolutely technical chronograph sub-dials. Water resistant to 200m, this perpetual calendar is powered by the Eco-Drive E650 movement, is radio-controlled in 5 time zones, boasts a 1-second chronograph that measures up to 60 minutes and has a power reserve indicator. With sophisticated modern styling, this striking watch will help you keep track of your hectic lifestyle with ease. AT4000-02E