Art deco diamond broochFrance, probably imported from Russia, 750 white gold, hallmarked, 3 old-cut diamonds and approx. 130 rose-cut diamonds, the 3 central diamonds, total approx. 2.30 ct, the remaining diamonds approx. 2.50 ct, total approx. 4.80 ct, I-N, pi1-pi2, length 5.7 cm, width 2.7 cm, weight approx. 15.9 g