BOUCHERON, PARIS, A BELLE ÉPOQUE DIAMOND BROOCH / PENDANT

BOUCHERON, PARIS, A BELLE ÉPOQUE DIAMOND BROOCH / PENDANT, millegrain-set to the centre with an old circular-cut diamond, within a pierced open-work quatrefoil surround set with graduating old circular-cut and rose-cut diamonds, in platinum, with a detached diamond-set bail fitting, brooch signed Boucheron, Paris, with maker's lozenge for Frédéric Boucheron, later pin, width 3cm