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

A diamond cluster ring, the central brilliant-cut diamond in four claw setting, within a hoop surround of smaller claw set brilliant-cut diamonds, mounted in platinum, shank bearing partial hallmark and maker’s mark ‘GLB’, principal diamond approximately 0.75 carats, ring size O. £1500-1800