General Use; Using The Chronograph - Bell & Ross BR-CAL.301 Notice Technique

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VINTAGE CHRONOGRAPH
BR-CAL.301
: mechanical with automatic winding. Ref: BR-CAL.301. Power reserve of approximately 40 hours. :
Movement Functions
hours, minutes, small seconds o'clock and date with quickset. Chronograph with 2 counters (60-second and 30-minute
timers). Time-setting with hacking seconds.

GENERAL USE

. Once the watch has been stopped .
Starting the watch
Type model (non down crown) : wind the movement by rotating the crown clockwise.
SCREW-
Type model (screw-down crown) : unscrew the crown (rotate anticlockwise) to position 1. Wind the mechanism by rotating
the crown (clockwise).
After approximately 40 rotations, the watch is fully wound (the winding mechanism does not have a stop to prevent
overwinding). The power reserve is approximately 40 hours when fully wound. When the watch is worn , the automatic
mechanism will wind the movement.
Setting the date
Quick setting (crown in position 2): pull the crown out to position 2 and set the date by rotating the crown anticlockwise.
Slow setting (crown in position 3): to ensure the date changes at midnight rather than noon, it is recommended to set the
date by adjusting the hands of the watch. Pull the crown out to position 3 and turn the hands until the date changes. Then
set the precise time.
Setting the time (crown in position 3). The seconds hand will stop, enabling the time to be set to the nearest second. Set the
time by rotating the crown in the required direction.

USING THE CHRONOGRAPH

The chronograph function can measure time in minutes and seconds.
Measuring a time period
Unscrew the pushers on the relevant models (rotate anticlockwise).
First press of Pusher P1: sets off the time measurement.
Second press of Pusher P1: stops the time measurement.
Third press of Pusher P2: resets and stops the chronograph.
Measuring a time period with an interruption
First press of Pusher P1: sets off the time measurement.
Second press of Pusher P1: stops the time measurement.
Third press of Pusher P1: restarts the time measurement.
This allows one or more time intervals to be subtracted from the total time measured.
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