World Chronograph A-T Model: AT8110-53E This World Chronograph A-T represents simplistic sophistication and is equipped with atomic clock synchronization for superior accuracy, ideal for the avid world traveller. This perpetual calendar chronograph is radio-controlled in 26 time zones. Crafted in stainless steel with a black dial. This timepiece additionally features a 1/20-second chronograph that measures up to 60 minutes, 12/24-hour time, a power reserve indicator, and sapphire crystal. Water resistant up to 100 metres.