A natural pearl and diamond ring, circa 1930. Estimate £12,000 - 15,000 (€16,000 - 21,000). Photo: Bonhams.

The drop and spherical-shaped pearls, measuring 6.5 x 8.5mm and 9.1 x 12.5mm, within a surround of millegrain-set old brilliant-cut diamonds, between similarly-set diamond shoulders, with baguette-cut diamond accents, diamonds approximately 1.10 carats total, ring size J½ 

Accompanied by a report from GCS stating that the pearls are natural, saltwater. Report number 5775-2461, dated 2 July 2015.

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