Henri Dubret - an Art Nouveau gem-set foliage panel ring, circa 1900s, the navette-shaped ring head framing pierced and enamelled ivy leaf motifs, decorated with delicate black enamelled foliage on the edge, interspersed with old-cut diamond highlights, centred with a cushion-cut citrine and flanked by single-cut diamonds on the shoulders, D-section shank signed 'H.Dubret' and struck with French eagle head mark (indicating 18ct gold), as well as the lozenge maker's mark, ring head 2.9 x 1.2 cm, ring size O, total weight of item 4.5 grams.