I've had this happened a couple of times when purchasing a preloved timepiece. Happened first when I purchased my first Omega Pro Ti series. Although the watch has been serviced a few months prior to my purchase, the watch for some unknown reason tried to adjust on me as its new owner. It took a couple of days before the functionality is at its best again. For instance, my SuperOcean upon purchasing didn't reach its power reserve and stopped after only 17 hours even fully wound while left in the box. It even stopped once while on my wrist. Somehow, I feel that it's just trying to adjust to its new owner
. The previous owner mentioned that it never happened to him and the watch don't even get winded since he always wears it. Btw, a full service was done in 2012. So finally it happened and the watch is back to its full COSC specs again. Full power reserve and keeping perfect time after a couple of days of ownership. Now it's been over a couple of weeks and I couldn't be happier with my first Breitling!Thanks for listening and hope you find it interesting.
Never mind, that's all part of a watch obsessed life I guess.
(only joking).
All good though, as when it finally went to the great watch cemetery in the sky I bought her the mechanical version straight away. Fortunately, it has never let her down, run slow or stopped for no particular reason at all. 
