A Jewelled Varicolored Gold-Mounted Guilloché Enamel Photograph Frame, Carl Blank, St Petersburg, circa 1890

rectangular with arched top, the surface enameled in aquamarine over wavy engine-turning, the aperture framed by rose-cut diamonds, below a rose-cut diamond-set ribbon and flowers at each corner, the gold border surmounted by varicolored gold flowers, each side with acanthus leaf terminals and feet, scroll strut, ivorine reverse, struck to lower edge with workmaster's initials, 56 standard

height 2 ⅝ in.

6.6 cm