Agate bowl with gold and enamel mount, 19th c., in the style of Annibale Fontana, 17th c. Italy, forming a table centrepiece, the three graces holding a navette-shaped agate bowl with gold mount, the front with a grotesque bearing a 5-headed Hydra crown, behind a green enamelled gold snake, the lid with grip in the form of a nude woman seated on a mound, h. 21 cm, length 19 cm (lid 200g 18k)