Need help on Hora Mundi 3700 problem
Bought a pre-owned 3700 world timer. Just got it back from a service in Switzerland via Swatch Toronto. The watch's minute hand loses 2 minutes a day. The seconds hand runs correctly (-1 second/day). After testing, I have identified the issue, the date ch...
That's a great watch, I was just browsing for one last night.
I think the issue was Swatch didn't do a good job servicing it.
They did a great job restoring the exterior...
… but messed up the movement. I was afraid of that (complicated movements) with these big companies.
Agree that it should go back to the service center
My thoughts are that the date change is drawing too much power. In other words, your amplitude is dropping during the 2 or so hours it takes for the date to flip and that the drop in amplitude is hurting the timekeeping. Another possible issue - If you ha...