Hi Vladimir, welcome to the forum.
Not French but Belgian made by Schapmans
Silversmith mark: S with a lozenge above for: Schapmans - From the city Mechelen - Malines — Belgium.
Their workshop existed roughly between 1866-1920 at:
17 rue des Beggarts
17 rue des Moulins
32 en 22 rue Sainte Catherine
in Mechelen - Malines — Belgium.
2nd mark, the
A under a lozenge, is not a hallmark it has been applied by Schapmans to indicate silver (
Argent) 800/1000 fineness.
Regards,
Oel