Sapphire and diamond ring, Harry Winston

Set with an oval sapphire weighing 20.67 carats, between triangular diamond shoulders, signed HW, numbered, size 46^1/2, sizing beads, case by Harry Winston. 

Accompanied by SSEF report no. 85357 and a copy of Gübelin report no. 9606099, each stating that the oval sapphire weighing 20.67 carats and measuring 16.63 x 14.08 x 10.14mm, is of Burmese origin, with no indications of heating. Signed HW, numbered 307C7? (sizing beads), stamped Pt 950 and Or 750 for platinum and 18 carat gold. Sapphire blue of strong saturation, with typical surface reaching inclusions, minor chips and abrasions; for further details on the sapphire, please refer to the gemmological reports. Side diamonds bright and lively. Signs of normal wear to the metal, sizing beads. In very good condition.
"In response to your inquiry, we are pleased to provide you with a general report of the condition of the property described above. Please note that colour, clarity and weight of gemstones are statements of opinion only and not statements of fact by Sotheby's. We do not guarantee, and are not responsible for any certificate from a gemological laboratory that may accompany the property. We do not guarantee that watches are in working order. Prospective buyers should inspect each lot to satisfy themselves as to condition and must understand that any statement made by Sotheby's is merely a subjective, qualified opinion. Prospective buyers should also refer to refer to any Important Notices regarding this sale, which are printed in the Sale Catalogue, in particular to the Notice regarding the treatment and condition of gemstones and to the Notice regarding import of Burmese jadeite and rubies into the US.
NOTWITHSTANDING THIS REPORT OR ANY DISCUSSIONS CONCERNING A LOT, ALL LOTS ARE OFFERED AND SOLD "AS IS" IN ACCORDANCE WITH THE CONDITIONS OF BUSINESS PRINTED IN THE SALE CATALOGUE."