zOwie Omega Discussion Forum

I too thought that the run-in period was a myth. That is, until I made some careful observations on my most recent Omega, a PO that I bought in early Feb this year. I've been checking it against time.gov twice a day (before bed and after getting up) - never thought I'd be quite this anal about watch accuracy, but I've become fascinated. It started off at a weekly average of just over +4 secs/day, but quite variable within that. Not much change over the first month, but in the last 4 weeks, the rate of increase has gradually slowed to a fairly steady average of +2.25 secs/day, and seems to gain more overnight than whilst worn, unless it gets a lot of shaking around. In my case, crown up or face up seems to minimise the increase. Hope this helps. The SeMP, however, has always been spot-on. I check it every month or so and almost never have to change it. The rest are manual winds and I rarely keep them going for long enough these days to check accuracy over a longer period. At the end of the day, all these watches are more accurate that I am, so I don't worry about it.