An automatic mechanical
watch comes with manual winding mechanism. When the watch is worn on the
wrist, the mainspring is wound automatically through normal wrist
movement.
The watch can also be wound up by turning the crown. To do so, unscrew
the crown (some watches do not require to unscrew the crown) by turning
it counterclockwise.
To start the watch after it stops completely, wind it up either by
turning the crown or swinging it from side to side until the second hand
starts moving. Then, set the time and date before putting the watch on
the wrist.
To wind up the watch, unscrew the crown by turning it counterclockwise,
and then turn it clockwise slowly. The watch cannot be wound by turning
the crown counterclockwise.
The watch is wound up fully. (Turning the crown further will not break
the spring.) Once the watch is wound up fully, it operates for about 50
hours or indicated by your watch.
If the watch is used without being wound up fully, gain or loss of the
watch may result. To avoid this, wear the watch for more than 10 hours a
day. If the watch is used without wearing on the wrist; If it is used
on the desk like a clock, for example, be sure to wind it up fully every
day at a fixed time.
If you use a watch that has stopped with the mainspring unwound, winding
the mainspring with the crown will not start the watch immediately.
That is because the mainspring torque (force) is low at the beginning of
its winding due to the characteristics of mechanical watches. The
second hand starts to move when a certain degree of strong torque is
reached after the mainspring has been wound up. However, swing the watch
from side to side to forcibly turn the balance can start the watch
sooner.