A diamond necklace that has not seen the light of day for over 40 years has become the most expensive diamond necklace to be sold at auction outside of London.

The necklace was consigned to Duke’s Auctioneers from a distinguished private collection.

It remained in a safe until recently when it was worn during the auction viewing for the first time since the 1960s. It sold for a total of £231,800.

The necklace, dating to the 1860s, is set with 53 diamonds.