Art Deco vanity case, c.1925 (enamel, diamonds, mother-of-pearl & gold)

The rectangular black enamel and 18k gold case, set with a vari-cut diamond cascading water fountain with a blue, pink and green mother-of-pearl pool and sky, within a green guilloché enamel foliate frame with black enamel and diamond detail, the calibré-cut emerald and diamond pushpiece, opening to reveal a fitted mirror, a covered lipstick holder and a covered compartment, to the diamond, black and green guilloché enamel geometric link and diamond and black enamel ring, circa 1925, case 3½ x 7 ins., with French assay marks and maker's mark Signed Mauboussin, Paris