WatchProSite|Market|Digest

Ulysse Nardin

Good question actually. The answer is there is not a precise indicator...

 

I would say the 2 photos I posted closely represent the extremes of "almost empty" and "fully wound", as you can see how the spring is stacked. I can add a photo in a few days of a "half wound" type of look, where the spring will be more evenly space from outside to inside.

  login to reply