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

Two 19th century rose-cut diamond set rings, the first centred with a rose-cut diamond between four smaller similar stones, all in closed back settings, within a lozenge-shaped openwork scrolled mount, mounted in gold and silver; the second composed of a round flowerhead cluster of foil backed rose-cut diamonds, to a later shank with scroll engraved shoulders. £400-500