Lot 33. A diamond brooch, Cartier, circa 1960. Estimate US$ 25,000 - 35,000 (€21,000 - 29,000). Unsold. Photo: Bonhams.

of openwork spiral design, centering a round brilliant-cut diamond, weighing 1.21 carats, accented throughout with baguette, old European and round brilliant-cut diamonds; signed Cartier; accompanied by a signed box; estimated remaining diamond weight: 9.00 carats; mounted in platinum; length 2in.

Bonhams. FINE JEWELLERY, 19 Sep 2017, 13:00 EDT, NEW YORK