Hello all,
I have a Festina Automatic watch with Miyota movement, for over 2 years now. For a while now there are times that the watch suddenly begins vibrating vigorously and then stops. I think it is releasing all its power in one go, but during the vibrations the seconds hand keeps a normal rate. I tried looking online but couldn’t find anything regarding this issue. Has anyone experienced something like this and, if so, how did you solve it?
Ya, I suppose the mainspring could be rapidly releasing tension. I suggest taking it to a watch repair shop and have them look at it.