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

An Edwardian seed pearl and aquamarine brooch, the circular openwork brooch composed of a series of knife-edge bars supporting a seed pearl set wreath around a central millegrained collet set round-cut aquamarine, to a frilled border of half seed pearls, mounted in yellow gold, diameter 36.5mm. £140-200