Lot 621. A 10.27 carats H colour and VVS1 clarity Diamond Single-Stone Ring, by Harry Winston, 1973. Estimate HK$ 1,450,000 - 1,600,000 (€160,000 - 170,000). Sold for HK$ 2,187,500 (€235,864). Photo: Bonhams.

The marquise-cut diamond, weighing 10.27 carats, between tapered baguette-cut diamond shoulders, signed Winston, Jacques Timey maker's mark, ring size 5¾, original case.

Accompanied by a GIA report stating that the diamond is H colour and VVS1 clarity. Report number 1186783769, dated 4 October 2017.

Accompanied by a Harry Winston receipt and Insurance Valuation letter, both dated 1973. 

Bonhams. RARE JEWELS & JADEITE, 26 Nov 2017, 14:00 HKT - HONG KONG, ADMIRALTY