Accuracy of mechanical watches and break-in
I know this subject has been hashed over before, but do you people think that mechanical watches experience a "break-in" period like a car? My experience has been that there can be a slight change in accuracy of mechanical watches from "brand new" to slightly new, but that this settling-in of the movement is maybe a second or two per day. I own a mechanical Grand Seiko and it specifically states in the manual that there is a break-in period of 3 years and that the first service should be performed at this point to address metal particles etc. They do not refer to accuracy changes, however. Thanks, Roger.