Diamond double clip brooch and a ring

The double clip brooch of scroll design, set with circular-cut and baguette diamonds; the ring set at the centre with a circular-cut diamond between a pair of baguette diamonds, size 56, maker's mark for Bucherer.

Ring: Maker's mark CB for Carl Bucherer. Central diamond estimated to measure 8.00 x 7.85 x 4.80 mm, as gauged in collet-set mounting, estimated to weigh approximately 1.80 carat, in our experts' opinion H-I colour, SI1 clarity. Brooch: Maker's mark ZC. Clip fitting stamped OR for gold. Diamonds estimated to weigh a total of approximately 10.00 - 11.00 carats, on average of G-I colour and VS-SI clarity, as gauged and graded in mounting. Normal signs of wear to the metal, scratches consistent with wear. In good condition. Total gross weight 46 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."