Cal. No. 9051
Refine your search9051
Winding the mainspring
Automatic winding function
This is an automatic winding mechanical watch using a mainspring as power source.
When wearing the watch, your arm’s motion rotates the oscillating weight to wind the mainspring automatically.
The mainspring is wound for about 1-day movement automatically when wearing the watch for 8 hours or more a day.
!
If you do not move your arms much in your daily life, the mainspring may not be wound sufficiently.
!
When the watch is not worn, the mainspring will run out in about 2 days and it will stop.
!
Once the mainspring is wound fully, the watch will run for about 42 hours.
!
You can wind the mainspring manually.