I seem to be collecting pendant watches. I've loved them since I was a little girl and they seem to be back in style - at least there are a variety to choose from. The two watches could be set at two different time zones if necessary although I have been keeping mine on the same. I believe it is self-winding because if I wear it every day it keeps perfect time but if I don't wear it for a few days, sometimes one or both have the wrong time. But once I reset and wear it, it is keeping perfect time again.