Citizen World Chronograph A-T, the ideal timepiece for the avid world traveler. Atomic timekeeping in 26 time zones, 1/20-second chronograph measures up to 60 minutes, perpetual calendar, 12/24-hour time, power reserve indicator,day and date. Crafted with a stainless steel case and bracelet featuring a black dial and sapphire crystal. Featuring our Eco-Drive technology – powered by light, any light. Never needs a battery. Caliber number H804