This type of bowl is known in France is known as a "coupe à quêter" (collection cup). At provincial weddings such cups are passed around among the wedding guests who drop coins into them as gifts for the young couple.
Inscription: Engraved on one side: Fse Lancien; on other side: F POSTIC
Marking:  Crowned fleur-de-lis, 2 grains de remède, I L, a heraldic ermine, pellet below (maker's mark)  Crowned maltese cross (charge mark, possibly of controller, bishopic of St.-Pol-de-Léon, ca. 1725)  A head (discharge mark, possibly of controller, bishopic of St.-Pol-de-Léon, ca. 1725)  Lyre (French mark for old work, 1781-92)  Boar's head (Paris restricted warranty mark for silver, 1838-79)
Location of marks: - on bottom ,  on handle