With a passion for speed and accuracy the re-imagined Perpetual Chrono A-T Collection features radio-controlled atomic clock synchronisation for superior accuracy in 5 time zones, all powered by any light with Eco-Drive Technology. Shown here in grey ion-plated case and bracelet with charcoal grey dial with sapphire blue accents, chronograph, perpetual calendar, alarm, 12/24-hour time, power reserve indicator, day/date and anti-reflective sapphire crystal