Four gold vinagrettes, 19th & 20th century

first example, Geneve, c.1840, black and white enamel decoration incorporating butterflies and scrolling foliage surrounding a geometric motif, enamel and gold chain; second example, 20th century in earlier taste, shaped rectangular, central engine-turned section with hinged cover; third example, in neo-classical taste, oval, bright-cut engraving incorporating a blank shield on hinged cover; fourth example, 20th century in earlier taste, formed as a classical urn, hinged cover