A mid 20th century pearl necklace with sapphire and diamond clasp. Estimate £50,000 - 80,000 (€68,000 - 110,000).  Photo: Bonhams.

The three rows of graduating pearls, measuring 4.35 to 11.00mm, with a central openwork clasp set with cabochon and square-cut sapphires and old brilliant, single and baguette-cut diamonds, length 38.3cm

Accompanied by a report from SSEF stating that 126 pearls are natural, saltwater and one pearl is cultured. Report number 81050, dated 2 July 2015.

Bonhams. FINE JEWELLERY, 24 Sep 2015 12:00 BST - LONDON, NEW BOND STREET