I just purchased a brand new AP lady RO self winding calibre 2140 two days ago, and it has been acting strangely. It was working ok for the first 20ish hours, but it stopped moving at about the time I took off the watch. I only noticed it the next morning, and despite wearing it on my wrist for a full day thereafter, it was still not moving. I tried winding it but it didn't seem to make any difference. Frustrated, I gave the watch a harder shake and I felt some kind of vibration and that's when it started working again. I put it on for an hour or so (without much movement during this time) and when I took it off, it seemed to have stopped again! Then I tried shaking it a bit and it resumes working. This is my first self winding automatic watch but the behavior of the watch doesn't seem normal to me. Has anyone had similar experience? What could be the problem here and what can I do? I really appreciate some advice here, thanks!!