Lot 203. Natural pearl, cultured pearl and diamond necklace, 1920s. Estimate 31,000 — 45,000 CHF. Lot sold 230,500 CHF. Photo: Sotheby's 2012

Designed as a single row of graduated natural pearls measuring from approximately 4.8 to 8.6mm, with four cultured pearls near the clasp, on a geometric clasp set with circular-cut and baguette diamonds, length approximately 575mm. 

Accompanied by SSEF report no. 64901, stating that seventy-nine of the pearls were found to be natural, saltwater, and that four were found to be cultured.

Sotheby's. Magnificent Jewels, Geneva, 14 Nov 2012