Ulysse Nardin

Hi! I have a question about the accuracy of Ulysse Nardin’s non-COSC chronometer watches. As I travel quite a bit, I am considering purchasing either a UN GMT +/- Big Date or a UN Michelangelo UTC Dual Time. Before spending several $’000 on a watch, I was wondering what sort of accuracy I could expect from either of these watches. (I couldn’t find anything on the UN website, however, I note for example that the IWC website states that their watches leave the factory adjusted to within 0 and +7 seconds a day.)
Any feedback from current UN owners as to accuracy will be much appreciated!
Stuart

I believe UN’s official position is that variations of 6 – 12 sec/day are normal. However, my Sonata Silicium is not COSC certified. It ran a very consistent +3/sec per day when I first received it. I sent it to the US service center and they calibrated it to near perfect.  The watch has lost 19 seconds in the past 60 days. Performance is better than any of the COSC certified watches I have owned. If you travel quite a bit, as I do, then there is nothing better than the Sonata Silicium. I could not be happier with mine.   

This message has been edited by S550 on 2010-03-04 10:33:48

Cosc is overrated any good watch company makes there watches to even better than cosc standards and your UN will run fine too i have a BP which is not cosc and runs 3 sec a day i believe that a lot a watch companies  use the Cosc tag to promote and market there product to stand out just MO

When I bought my JLC Master Control Calendar I asked the AD if it was COSC certified like my Rolex.  He said it wasn't but JLC and "higher end" manufacturers don't need to get COSC certification to prove accuracy as their standard accuracy is better than the COSC guidelines.  That seemed fair enough.  However my JLC gains about 1 minute per week (about 8 seconds/day), which would not pass the COSC test.  My 20 year old Rolex gains about 1 minute per month (about 2-3 seconds/day).

That being said I love my JLC and for ultimate timekeeping I have a Casio Waveceptor watch that I set my other watches to.

Colin

 

 

and ran about  3 sec s a day and it wasnt cosc  and was always accurate has your always run at 8 secs ? might need to be checked over