I was on allert when i bought my Baume & Mercier Classima in Berlin city. But national workday set many police on the streets, so it was the safetest city in Europe.
When i bought my Longines Weems, i was also allert on the streets. Walking with an expensive watch in a city, i go not say hello to everybody and wave my arm with a collectors item on my wrist.
So if you are proud of your Rolex on your wrist, don’t shake to much hands to strangers . I wil say, walk on a pavement in Genéva, and your expensive watch never be robbed by a thief. Paris is a different story, see the tread.