An early 19th century Swiss gold and enamelled viniagrette

An early 19th century Swiss gold and enamelled viniagrette, cushion-shaped with openwork scroll borders, painted with polychrome flowers on the base and cover and set with half pearls, the grille pierced with a flower and scrolls, unmarked 1820-40 (probably originally fitted on an ena?? ??? and now with a suspensory hook), 4.25in (1.6cm) wide.