and I would change the gasket as well. Not so much whether you swim with the watch but normally these gaskets are no good when aged, dismantled and the reuse again….
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