I’ve had my SKX for about about year now, and have been extremely pleased with its timekeeping. It’s been to my amazement consistently within +2 to +4 sec per day. Suddenly without having dropped the watch or anything out of the ordinary I woke up a week ago and it was about 2 hours fast. I reset the time and it was running about 45 minutes fast after about half a day. I was about to send it in to Seiko for warranty servicing, as I bought it New, but just like that it’s back to the way it was at +4 seconds a day for the last few days. Should I just leave well enough alone, or have it serviced? Any idea what would cause such a thing, for it to suddenly run fast and then back to normal?