The watch is self winding but it stops frequently. It runs for about 5 to 20 minutes and then it stops, if I just shake it very little, maybe just one time, it starts running again and then after 5 to 20 minutes it stops again, even if you se that the mainspring inside is fully wound. The first week I had the watch it worked perfectly, but then it just began to stop ticking occasionally. 
I have a two year warranty and I send the warranty card together with the watch. I bought the watch on the 28 of september 2012.
Many thanks from Jesper Stengard