Timekeeping issue

[OysterAbba]

Hi All,

I have a GMTIIc and I had it regulated around 12 months ago. Ever since then it runs on average at about +1 or 2 seconds per day. A few weeks ago whilst using the WatchTracker app I noticed that on one day the watch was at +1.4 seconds per day and then the next day at -2.4 seconds per day. I reset the timing and everything was back to normal again. Yesterday I noticed that the timing was +1 per day (absolutely normal) and then this morning it showed up as -6.2 per day. Im just wondering why there would randomly be a 7 second change in accuracy but then this gets fixed itself if I am to reset the watch. I’m sure that if the watch was to continue running it would start gaining time and go back to normal but why the sudden random blip?

I also didn’t do anything out of the ordinary on the day of the -6 result so can’t put it down to anything.

Any ideas for advice would be necessary.