Michael I. from Chapel Hill, North Carolina, USA asks:
For an automatic watch is worn daily, is there any benefit or harm from using a watch winder every night?
Technically speaking, if the watch is worn daily, then by the end of the day, the mainspring should be fully wound and thus have plenty of power left when the watch is worn in the AM. Of course, that assumes you move your wrist around a lot. People with desk jobs sometimes move surprisingly little, so the automatic watches they wear don't get wound too much. Also, we are assuming you don't wear your watch while sleeping... if yes, then that's a whole new question which we won't address here and which might require a bit of psychological counsel as well
Back to question at hand. Some early automatic watches (really old, like 1950s and earlier) did not have a way to limit the winding when done manually using the crown, so for these rare cases putting the almost fully wound piece on the winder could have the same effect as over-winding with the crown. However, most (all) modern automatic will limit the winding once the main spring is fully wound.
That said, I would see no issue with putting the watch on a winder at the end of the day. Though, do check that your watch will limit winding the mainspring when it reaches its limits. This is info that manufacturers should be happy to share.
I'm guessing that after a few weeks, a wearer might skip using a winder every day, since the acts of putting it on the winder and removing the watch from the winder might be a chore that can be avoided with daily wear and regular movement. I happen to be someone with a slew of winders where I keep my automatic watches wound and ready to go, because I rotate several watches often and rarely wear the same watch two days in a row, so putting my watch on the winder at the end of the day is a necessity in my case. When it comes down to it, most people who need watch winders have more than one automatic watch that they rotate through wearing.
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