mkvc
1382
I keep one watch running on a winder.
It's a Rolex reference 1018, and I can just put it on whenever I wish. It is outrageously accurate, but I reset it every few months (or at least when there is a switch to or from Daylight Savings).
The other watches stop between wearings, so I set them when I wear them. I match minutes to seconds hand and set them to a time reference on my computer. For those that do not hack, I set them a fraction of a minute ahead.