Automatic watches stop when I do not wear them.
1/ How long can it keep on working when I do not wear it?
2/ What force should be used to ensure it does not stop? How long will it keep on working when not worn for a given force? Is there a simple calculation formula?
3/ When the watc stops, I just need to set the time again, wear it & it will work again. Is this "stop & work again" good for the watch mechanism? or is it safer for m to shake it from time to time to ensure it never stops?
Thanks for your help