I bought this watch new in January as a late Christmas present (to myself). Obviously, I've been keeping an eye on it's accuracy by setting it every Friday morning. I found it staying on a consistent +3.5 seconds a day - every week it would be about 25s fast. Like, well, clockwork. Until 3 weeks ago. When I went to change it one Friday, I saw that it hadn't gained any time - at all. I wondered if I'd maybe reset it the previous night, perhaps after some refreshments, and had forgotten I'd done it. So I just left it to see, as I'd heard that new watches can take 6 months to "bed in". Now, after 26 days since I last set it, it's lost 4 seconds.

That's 0.15 seconds a day. Wow.

 

Nice, I've always had excellent experience with the accuracy on my Seamasters, my SMPc has been running +3 since it arrived, and I love it