An antique agate and gold vinaigrette, circa 1860, of rectangular cushion form set with taupe coloured semi translucent agate, mounted within foliate engraved yellow gold mounts, opening to reveal an exquisitely engraved and pierced grille with a cornucopia and abundant flora, a presentation piece to J F Montgomery, 'His mother's gift' 1860, apparently, unmarked, length 4 cm, width 2.5 cm