If the watch features a chronograph, this function can be used to measure short intervals of time besides the normal time indication.
ILLUSTRATION: details of registers for minutes.
The chronograph displays fractions of a second on the central hand, and up to 30 minutes or 60 minutes depending on the calibre.
ILLUSTRATION: shown below are two different examples of chronographs. On top, the ST 1901 with 30 minutes register aligned with the crown. Below, the Seiko Instruments VK63 with 60 minutes register located at 180° of the crown.
To start a short-time measurement, the pusher positioned 1hour before the crown must be pressed and released.
Pressing and releasing the pusher another time will stop or restart the short time measurement.
WARNING: on chronographs with Mechanical Command, the hands should be stopped before attempting a reset.
Any damage due to negligence is not covered by the Limited Warranty.
To carry out a new measurement or when the chronograph function is no longer needed, pressing the pusher positioned 1 hour after the crown will reset the hands back to the starting position.
NOTE: to save battery energy, the calibre VK63 is designed to automatically freeze the chronograph hands in the starting position once that 59 full minutes, 59 seconds and 5/5th have been measured.