Diamond clip, Sterlé, circa 1956. Estimate 39,000 — 59,000 CHF. Photo Sotheby's

Designed as a stylised feather set with circular-cut and baguette diamonds, signed Sterlé, numbered, French assay and maker's marks, case stamped Sterlé.

Bibliography: Cf: Viviane Jutheau, Sterlé: Joaillier Paris, Paris, 1990, for similar examples of this clip.

Pair of diamond ear clips, Sterlé, circa 1956. Estimate 6,000 — 9,000 CHF. Photo Sotheby's

Each designed as a stylised feather set with circular-cut and baguette diamonds, each signed Sterlé, numbered, French assay and maker's marks.

Labradorite, gold and diamond brooch, Sterlé, 1960s. Estimate 20,000 — 30,000 CHF. Photo Sotheby's

Designed as a bird on a gold branch, the body composed of a polished labradorite, the eye and beak set with brilliant-cut diamonds, the crest embellished with gold cheveux d'ange, the tail feathers with textured gold and brilliant-cut diamonds, signed Sterlé, numbered, French assay and maker's marks.

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