Beautiful Art Nouveau Circa 1910 old cut diamond necklace with all the fittings to wear as a brooch. Measuring 46mm in width and set with an estimated diamond content of 6.50-7.00 cts. Fluid lines with sumptuous old cut diamonds mounted in 15ct yellow gold with silver settings and platinum chain. The special hand made key can unlock the hidden pendant fittings to enable the necklace to become a brooch. All removable brooch fittings included. Original box included.