Sapphire ring, Bulgari and sapphire and tourmaline ring

The sapphire ring set with a cushion-shaped sapphire, signed Bulgari, size K, the other ring set with a cabochon tourmaline and sapphire to a fluted mount, unsigned, size K^1/2.

Sapphire ring signed Bulgari and indistinctly numbered, sapphire measuring approximately 12.8 x 10.5 x 5.5 = 6.50 carats, pale blue stone, native-cut with window, the crossover ring stamped 750 to inside of shank for 18 carat gold, tourmaline pale pink, sapphire deep blue, scratches to both rings commensurate with age and wear.
"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."