Diamond necklace, tiara and aigrette, Falize, Paris, 19th century

the necklace composed of a detachable scroll and foliate openwork plaque, to a detachable knife-edge bar back necklace accented with old-cut and rose-cut diamonds, weighing approximately 6.00-7.00 carats, inner circumference approximately 360mm; the tiara, width approximately 100mm ; the aigrette heightened with a white egret's plume to a hinged triple-prong pin, height approximately 180mm, with tiara fitting, two fittings deficient, the fitted leather case with the monogram YC, the silk-lined fitted interior inscribed Falize, Orfèvre, Paris