Pendant necklace in yellow gold and diamonds

18k yellow gold (750/1000) necklace. Convertible pendant/brooch. Set with 33 diamonds. One old-cut diamond, total weight approximately 0.44 ct. 33 half-cut diamonds, total diamond weight approximately 2.28 ct. Total diamond weight approximately 2.72 ct. Twisted chain. Length: 60.00 cm. Chain width: 0.22 cm. Pendant dimensions: 2.57 cm x 3.74 cm. Total weight: 21.47 g. Eagle's head hallmark. Excellent condition.