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

A 9ct gold diamond and sapphire set necklace and bracelet ensuite, the necklace with central sapphire and diamond fan-shaped motif, on flattened fancy-link back chain, with matching bracelet, necklace length 39cm, bracelet length 17.3cm. £100-150