An Ulysse Nardin I didn't know: Minute Repeater from 1950.
36 mm Yellow Gold case, with a movement which looks familiar to those who know the Vacheron Minute Repeater.
Credit picture Phillips:
According to Phillips, it is most probably an unique piece. I tend to agree with them when they say that we often see time only and chronograph, when it comes to vintage Ulysse Nardin.
What a beauty!