Diamond necklace, late 1960s. Estimate 370,000 — 540,000 CHF. Photo: Sotheby's

Of ribbon design, set with drop shaped motifs framing cushion-shaped diamonds, highlighted throughout with brilliant-cut diamonds, further accented with pear-shaped and baguette diamonds, inner circumference approximately 355mm.

Sotheby's. Magnificent Jewels and Noble Jewels, Genève, 12 mai 2015, 10:30 AM