Patek Philippe NAUTILUS CH 28-520 C/522, Manual

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11 10
The crown must be completely unscrewed
before you can wind the watch or set the
time.
Please wind the watch and set the time before
you put the watch on. This prevents lateral
pressure on the winding stem. Please use
your fingernails to pull the crown out and
turn it gently between two fingertips.
Never pull out the crown in a humid envi-
ronment or underwater: the water resist-
ance of your watch is assured only when the
crown is pushed home and screwed down.
If your watch has stopped running, rewind
it by hand before performing any correc-
tions or adjustments (about 10 clockwise
turns of the crown).
Correction push pieces should be actuated
exclusively with the correction stylus that
was delivered with the watch. The use of
any other tool could damage your time-
piece.
Do not perform any date correction between
9 p.m. and 1 a.m.
Every year, the date must be corrected five
times – at the end of each month that has
fewer than 31 days.
CAUTION
CHRONOGRAPH
The chronograph is started and stopped with the
pusher at 2 o’clock. It is reset to zero with the
pusher at 4 o’clock, whether the chronograph
has been stopped or is running. When you press
the pusher at 4 o’clock while the chronograph is
running, this triggers the flyback function: all the
chronograph hands fly back to zero and instantly
start a new measurement. Conversely, if you first
stop the chronograph by pressing the pusher at
2 o’clock, actuation of the pusher at 4 o’clock will
cause the chronograph hands to return to the zero
position and stay there. When resetting the chrono-
graph to zero, make sure you press the pusher
at
4 o’clock firmly and squarely in the middle.
Note: If the chronograph function is not needed, the chrono-
graph hand can continue to run just like an ordinary
sweep seconds hand. This will not cause premature wear
of the clutch mechanism or reduce the power reserve.