Hi JayT
many thanks for the information.
Frankly, without your help I would never have recognized the correspondence of the mark on the tastevin with the number 131 of the Tardy.

It is not that I am attracted to suspicious tastevins, it is that, to learn, I look very often at auctions of silver objects, and when I find something that makes me suspicious I ask for help here from those who know.
To return to the tastevin, I believe that it is genuine and that the handle,original or made after, has been badly soldered to it.

Perhaps the other marks have been swamped by the weld.
Best regards
Amena
P.S. Searching with "leaf discharge" nothing is found
instead it is found with "poincon feuille décharge"