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

A cabochon sapphire and diamond set pendant, the oval cabochon sapphire drop millegrained collet set within a semi articulated hoop surround accented with pinched collet set rose-cut diamonds, mounted in gold and silver, with engraved decoration to the reverse of the setting, suspended on a later silver chain, pendant length 75mm. £500-700