Need help on Hora Mundi 3700 problem

Mar 11, 2019,09:33 AM

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 change at midnight.

At 10 pm, the watch runs correctly. At 11 pm, it loses a minute. By midnight, it loses 2 minutes. The seconds hand runs correctly. After the date change, the watch runs correctly again. 

IN the morning, the watch is still off by 2 minutes, but no more than that.

Everything else works fine, date change and world timer dial.

So, what's happening? Anyone else had this experience?


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That's a great watch, I was just browsing for one last night.

 By: Spangles - Mr. Tabby : March 11th, 2019-10:34
I think the issue was Swatch didn't do a good job servicing it.

They did a great job restoring the exterior...

 By: jim vancouver : March 11th, 2019-11:49
… 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

 By: jayeyedoubleemmwhy : March 11th, 2019-11:40
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... 

Thanks. Good points [nt]

 By: jim vancouver : March 11th, 2019-11:48