Sapphire and diamond necklace

Set with graduated circular-cut sapphires within a cluster of pear-, marquise-shaped and brilliant-cut diamonds, length approximately 435mm, numbered.

Please note that the sapphires in the necklace are later additions and therefore we can no longer guarantee that the necklace is an original Winston piece. The necklace has been made in 1976 and the central stones were originally diamonds. Signed Harry Winston, numbered 8192. Stamped PT 950 for platinum and OR for gold. The sapphires calculated to weigh a total of approximately 29.00 - 31.00 carats, blue of medium strong saturation, well matched in colour, with typical inclusions and very few abrasions. Diamond estimated to weigh a total of approximately 50.00 - 53.00 carats, G - H colour, VS - SI clarity, as gauged and graded in the mounting. Signs of very little wear to the metal. In very good condition. Gross weight approximately 100 grams.
"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."