"I wanted to create an improved automatic watch winder device to hold and gently wind one or more watches," said an inventor, ...

The mainspring in an automatic watch isn't hard-fixed to the barrel, so they don't really overwind, which is why one can get away with a generic per-movement preset on an automatic watch winder.

A watch winder from the Wolf 1834 Axis Collection. Winders keep the movement of an automatic watch greased and functioning, though there is debate over whether they are necessary.