there must be different versions of Ulysee Nardin Maxi Skeleton... and I found a version with slightly varied dial (& movement) design here ... Credit WatchTime Magazine Your version is really interesting and rare.. Wondering did you get it new and from UN? BTW - would love to see a better picture o
behind this seemingly simple but important component of a watch. I am no mechanical engineer but clearly we should all appreciate the work done here by early watch makers.