GMT C the best?

[Marcus09]

Hello fellow TRF. Since 2010, I’ve been collecting Rolex watches where I now have the following:
GMT C LN 2010)
Daytona white 116520 (2013)
Explorer (2015)
Sub no date 114060 (2017)
Recently, it came to my attention that my GMT, although being my first Rolex, is also the most precise. For instance, I’ve been wearing it for almost 1 week and it is still showing the exact same time as my iPhone (where I synced with it). My other watches are not the same, my latest one from 2017 (114060) has a 2 second daily difference since Rolex began testing them after casing. Before that it was around 5 seconds or so.
Does any of you encounter the same situation with one or more of your watches? If so, which model and which year?
Here’s a picture of my 2010 GMT C.



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