Lot 2038. Important 18.50 carats D IF diamond necklace, Harry Winston. Estimate HKD 19,500,000 - HKD 25,000,000 (US$2,500,000-3,200,000). © Christie's Images Ltd 2019

Round brilliant-cut diamond of 18.50 carats, square and circular-cut diamonds, platinum, 40.5 cm, maker's mark, no. 82124, blue Harry Winston case.

GIA, 2019, report no. 6207627893: 18.50 carats, D colour, Internally Flawless clarity, excellent polish and symmetry.

Harry Winston, 2019, letter: Date of manufacture 2003.