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

A three stone diamond ring, the central diamond of cushion-shape, in four claw mount, between a brilliant-cut diamond to each side, in six claw settings, to 18ct gold yellow precious metal shank, central stone weight 2.02 carats, the outer stones approximately 0.40 ct each, shank hallmarked, ring size O. £4000-5000