A FINE ANTIQUE DIAMOND BROOCH in yellow gold, set to the centre with an old European cut diamond

A FINE ANTIQUE DIAMOND BROOCH in yellow gold, set to the centre with an old European cut diamond of approximately 2.55 carats surmounted by a curved row of graduated old European cut diamonds, suspending three rows of old and rose each terminated with an old cut diamond drop, the diamonds all totalling 9.5-10.5 carats, no assay marks, 4.5cm, 12.0g.