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12
USING
YOUR WATCH
ROLEX
SERVICE
THE HEART OF THE
COSMOGRAPH DAYTONA MODEL
CALCULATING AVERAGE SPEED
PER HOUR
The Oyster Perpetual Cosmograph
Daytona can be used to calculate
average speeds per hour over a given
distance (1km, 1mile, etc.).
To calculate average speed per hour,
follow the steps in the order given:
– Completely unscrew the pushers by
turning them counterclockwise.
– Ensure that the chronograph seconds
hand is stopped. If necessary, stop it
by pressing the upper pusher.
– Press the lower pusher to reset the
chronograph seconds hand and
counters to zero.
– At the starting point of the distance
to be covered, press the upper pusher
tostart timing.
– When the distance has been covered,
press the upper pusher to stop timing.
– The chronograph seconds hand
indicates the average speed per hour
on the graduated bezel (chosen unit
ofdistance/h).
– Screw the pushers back down by
turning them clockwise.
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