Formerly the property of Her Royal Highness The Duchess of Genova. An antique natural pearl necklace. Price Realized CHF339,750 ($351,075). Photo Christie's Image Ltd 2013

The single-strand composed of thirty-seven slightly graduated natural pearls, measuring approximately 10.0 to 7.9 mm, to the pearl and diamond bar clasp, mounted in silver and gold, clasp engraved with the date 1842, pearls re-strung on metal at a later date, 49.5 cm - Estimate CHF160,000 - CHF210,000 ($168,357 - $220,969)

Accompanied by report no. 67282 dated 18 March 2013 from the SSEF Swiss Gemmological Institute stating that the 37 pearls are natural saltwater pearls

CHRISTIE'S. MAGNIFICENT JEWELS, 15 May 2013, Geneva

Please note that due to the setting, the pearls on the clasp have not been tested