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

A diamond and ruby ring, first half of 19th century, the central double heart motif composed of a pear-shaped old-cut diamond and a pear-shaped mixed-cut ruby, beneath a crown surmount and between diamond set shoulders, all set with old mine-cut diamonds (one diamond missing), the stones in foiled closed back settings, mounted in gold and silver, ring size L. £300-400