amanico[JLC Moderator]
400975
Tudor Black Bay For the French Commandement des Opérations Spéciales ( COS ).
For the French OPEX. 112 pieces issued in 2017.
I saw one a couple of years ago,
This is the second I could see, on a bracelet, this time.

I suppressed the number of the watch as it is related to the military, but here is the case back photo:
The rare bird by definition...
Best,
Nicolas