A fixed inverted red triangle on the dial points to the chosen reference time – the time at home or at the traveller’s usual workplace – on the off-centre 24-hour disc. At a glance, this 24-hour display clearly distinguishes daytime hours from night-time hours in the other time zone. The dials now feature rectangular index hour markers and longer hands, as well as a Chromalight display with long-lasting luminescence, which enhances legibility.

A deep red rectangle in one of the 12 windows around the dial indicated the current month, a striking characteristic of the Saros annual calendar. This ingenious mechanism simplifies life for the wearer of the watch, who no longer needs to think about adjusting the date at the end of a 30-day month. The annual calendar displays the correct date through the year. Only one adjustment is needed – on 1 March (February having only 28 or 29 days). The date is connected to local time and automatically changes according to the traveller’s local time zone.

DUAL TIME ZONE AND24-HOUR DISPLAY

Thanks to its innovative display and simple operation, the Oyster Perpetual Sky-Dweller allows the traveller to adjust the watch to different time zones during a journey, while benefiting from a constant, clear display of reference time.When travelling, the wearer can read the reference time in 24-hour format via a rotating off-centre disc. A fixed red triangle on the dial points to the time.

RING COMMAND BEZEL

• The Oyster Perpetual Sky-Dweller is equipped with a rotatable Ring Command bezel which allows easy selection of the function to be set: date, local time or reference time.
• The function selected can then be set quickly by turning the winding crown in either direction.

Also known as: Rolex 326139