Hello everybody. I've owned this Sinn U1T since July last year. It's always been +6/7sec a day since day 1.
Suddenly yesterday I noticed that basically overnight (or maybe the 2-3 days I didnt check), it's somewhere between +1/2 sec a day!
How would that be possible?
I've heard about break-in time, but having not noticed a difference all these months I was thinking it was not present on my watch.
Does break-in come in all of a sudden like that? Not even gradually over time?