Combine Citizen's proprietary Eco-Drive technology with atomic timekeeping makes this the most accurate watch in the world. This 2,500 piece Limited Edition Perpetual Chrono A-T is radio-controlled in 5 time zones, boasts a 1-second chronograph, perpetual calendar, 12/24-hour time, power reserve, day/date and alarm. Shown in a stainless steel bracelet with black ion plating, black polyurethane strap with stainless steel accent and blue dial and packaged in a special box. Caliber number E650.