Amazing Accuracy GMT Master ll (BLNR) 2019

[D.P.G.]

I am not one who constantly check's accuracy however today on a long fight while the First Officer was flying this leg I decided to do a calculation. Today is the 6 month anniversary of my GMT Master ll (183 Days). When comparing it to the chronometer in the aircraft which is calibrated to atomic time I noticed I could not determine a difference in time. Since the eye takes about 7 tenths of a second to adjust from one focal point to another I will say the watch is 1 second off. The math is amazing the watch ticked 126,489,600 time's and is within 8 ticks that results in an overall accuracy of 99.99999993675369 %. I had a Submariner for 12 years and it gained 1 second a day either I'm just really lucky or Rolex has made significant improvements with this new movement. And yes I was keeping my eye on the flight instruments while doing this. I'm wondering what others are seeing for accuracy as this is beyond perfection.