The first one of these watches I purchased at Amazon quit working within one month.  The self winding movement on these watches is such that you have to wear the watch 24 hours a day 7days a week or it will quit running.  The second watch sent as a replacement started gaining time after a month or two of wearing it. When I threw it in the trash, it had reached a point where it was gaining one minute every day.  Seiko has been  making self winding watches for years and they keep perfect time and won't quit working if you take them off for a day or two.  this watch may look like a combination of a Rolex Submariner, and a watch made by Breitling, but the movement is junk, and I am surprised that Amazon continues to sell them considering how many of them get returned.