Jewellery, Watches and Objects of Vertu to include the personal archive of Louis Osman, goldsmith and architect

A Victorian pearl and diamond bar brooch, the central quatrefoil cluster of four pearls with rose-cut diamond points between, supported on a rose-cut diamond bar between spaced rose-cut diamond borders, to half pearl terminals, mounted in yellow gold, cased, pearls unwarranted and untested, bar brooch length 40.5mm. £140-200