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8
USING
YOUR WATCH
ROLEX
SERVICE
THE HEART OF THE
SKY-DWELLER MODEL
SAROS ANNUAL
CALENDAR
The Oyster Perpetual Sky-Dweller has
an extremely reliable annual calendar
thanks to an ingenious mechanism named
Saros, patented by Rolex, and whose
unique design was inspired directly by
the astronomical phenomenon of the
same name.
This annual calendar automatically
differentiates between 30-day and 31-day
months. It displays the correct date
throughout the year and requires only
one adjustment a year – on 1
st
March,
February having only 28 or 29days.
The current month is indicated in
red in one of the 12 windows around
the circumference of the dial: January
at1o’clock, February at 2 o’clock,
and so on.
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