3091086 Belle Epoque tiara, 1911 (enamel, diamonds, platinum & gold) by Chaumet, Joseph (1852-1928); Private Collection; (add.info.: Of Kokoshnik design, composed of a series of graduated translucent royal blue plique-?-jour enamel curved panels, each overlaid with old-cut diamond trailing forget-me-not floral motifs, interspersed with collet-set diamond lines, to the cushion-shaped diamond openwork cartouche centre and similarly-set upper border, circa 1910, mounted in platinum and gold, with a later fitted case created in Paris in 1911 by Joseph Chaumet for the wife of the English nobleman, the 2nd Duke of Westminster (1879-1953), Duchess Constance, known as Shelagh (1876-1953) ); Photo 穢 Christie\'s Images; French, out of copyright.