Sapphire and diamond ring

Set with a sugarloaf sapphire stated to weigh 11.83 carats, the mount pavé-set with brilliant-cut diamonds, size 51, Swiss maker's mark. 

Accompanied by Gübelin report no. 9611112, dated 9 December 1996, no. 1004050, dated 13 April 2010, and SSEF report no. 90977, dated 15 March 2017, each stating that the cabochon sapphire weighing 11.83 carats and measuring 12.95 x 11.41 x 9.31mm, is of Kashmir origin, with no indications of heating. Maker's mark for Séchaud, stamped 750 for 18 carat gold. Sapphire blue of strong saturation, clean to the naked eye, with minor inclusions, scratches and colour banding visible under 10 x magnification; for further details on the stone, please refer to the gemmological reports. Diamonds bright and lively. Signs of normal wear to the metal. In very good condition. Gross weight approximately 11 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.
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."