Hamilton 251.272 - Mechanical Watch Operations

8 © HAMILTON 2010 – INSTRUCTION MANUAL © HAMILTON 2010 – INSTRUCTION MANUAL 9
3. Operating instructions 3. Operating instructions
Setting the counters to zero
-minute counter
. Pull out the crown C to position (p).
. Set the -minute counter x to zero by pressing button B.
-second counter
. Pull out the crown C to position (p).
. Set the -second counter y to zero by pressing button A.
/ second counter
. Pull out the crown C to position (p).
. Set the / second counter v to zero by pressing button B.
Using the chronograph / Start-Stop function
Timing a single event:
. Press button A: the chronograph starts.
. Press button A: the chronograph stops.
. Press button B to reset to zero.
Note: Before you start timing, the hands should be reset to zero. If necessary, press button B.
Cumulative time function
This measures successive times. Each result is added to the previous one.
. Press button A: the chronograph starts.
. Press button A again: the chronograph stops.
Repeat these two steps as many times as desired. At the end of the last measurement, the chronograph displays
the total of all the times measured. Press button B to reset to zero.
Caliber .
GMT Adjustment of time zones T on the dial
. Unscrew the crown E and pull it out to be able to set the interior rotating bezel.
. Set the time zone T by turning the crown till the bezel indicates the time dierence between your local time
and T time by pointing to o’clock.
. Push the crown back in completely and screw it down.
Example: Your local time is  a.m. and the T time is  p.m., so the time dierence is  hours. Set the bezel so that
the time dierence  is pointing to  o’ clock. The T time will be displayed by the hour hand ( p.m.).
. Mechanical watch
Mechanical movement. The most traditional of movements in watchmaking is the mechanical one. To
ensure that the watch does not stop, it must be wound regularly – once a day.
Caliber - • - • -
Setting the time
. Pull out the crown C completely to position (p).
. Set the time by turning the crown in the desired direction.
. Push the crown back in completely to position (p): the seconds hand starts again, allowing perfect synchro-
nization with a time signal.
Caliber -
Setting the time
. Pull out the crown C completely to position (p): the seconds hand stops.
. Set the time by turning the crown in the desired direction.
. Push the crown back in completely to position (p): the seconds hand starts again, allowing perfect synchro-
nization with a time signal.
Setting the date
. Pull out the crown C to position (p).
. Turn the crown clockwise to set the date.
. Push the crown back in completely to position (p).