A fine vinaigrette and acrostic gem-set fob pendant, France, 1830s, composed of a gold hoop

A fine vinaigrette and acrostic gem-set fob pendant, France, 1830s, composed of a gold hoop suspending two lengths of woven gold wire chain, one strand connecting to a vinaigrette modelled as an acorn, its textured surface in gold cannetille studs, decorated with a band of roses in varicoloured gold and foil-backed rubies, opening to reveal a container with a pierced hinged lid of floral design, the other with a split gold ring of floral design suspending eight floral pendants set with various stones including sapphire, opal, uranite, garnet (vermeil), emerald, orange natrolite, rock crystal (iris quartz) and ruby, possibly intended to form the acrostic word 'Souvenir', total length 13cm, acorn length 3.2cm including hoop, acrostic pendant 2.4cm including hoop, acorn and plain gold hoop each with French assay mark for Paris, 1819-38