Necklace in platinum 850 thousandths and 18k yellow gold featuring a central openwork motif, set with twenty-one old-cut and rose-cut diamonds and a pear-cut diamond approx. 0.25 ct, fine forçat link chain, spring clasp and safety chain. Early 20th century. Main diamond size: 5.9 x 5.1 x 1.4 mm Pendant size: 3.2 x 2.5 cm Chain length: 44.8 cm - Gross weight: 5.6 g