A diamond single-stone ring, circa 1935. Photo Bonhams

The old brilliant-cut diamond, weighing 10.05 carats, between a double border of brilliant-cut diamonds, to a scrolling openwork gallery set with single and old brilliant-cut diamonds, remaining diamonds approximately 1.55 carats total, ring size N. Sold for £70,850 

Bonhams. Fine Jewellery, 25 Apr 2012. London, New Bond Street www.bonhams.com