It shows you the time at your point of departure as well as a local time on your overseas trips, when changing the time-zone.
The JLC 630 operates beyond the 12-hour-chronometer. The hands on the face can continue their progress like this for weeks or even months. This feature allows the display of both your departure-point-time and the respective local time. Proceed as follows:
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Before your departure, start the chronograph at precisely the 12 o’clock position, i.e. 12 a.m. Or 12 p.m. The hour indicator at 3 o’clock now serves as hour counter of your departure-point-time as long as the chronograph is not stopped.
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On arrival at your destination simply set the watch to the local time (winder in position 3). After having pushed back the winder to position 0 the chronograph movement will resume operation and the hour and minute counters will indicate the time of your departure-point.
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If you cross the date-line over the Pacific, you will have to reset the day which you do with the winder in position 2 (fast date change). You can choose whether you wish the departure-point-date or the local date (maximum difference of one day).
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Engage the chronograph at 12 o’clock (watch and chronograph are synchronised).
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At your destination set local time with winder in position 3.
If required the date can be reset with the winder in position 2.
Dials A and B will show the time at your point of departure.
PS: please note that using the chronograph in this particular manner is an additional drain on the battery.
Using this mode continuously could reduce the battery life from 3 to 1 years.
