Diamond necklace and a natural pearl and diamond brooch, 1950s

The necklace of scroll design, set with circular-, square-, single-cut and baguette diamonds, the detachable centre can be worn as a double clip brooch, length approximately 440mm, the brooch also of scroll design similarly set, suspending a drop shaped natural pearl measuring approximately 10.55 x 10.60 x 14.50mm, can be worn at the centre of the necklace, fitted case. 

Accompanied by SSEF report no. 84208, stating that the drop shaped pearl measuring approximately 10.55 x 10.60 x 14.50mm, was found to be natural, saltwater. Pearl of light cream body colour, with very good skin and lustre, a few minor blemishes; for futher details on the pearl, please refer to the SSEF report. The brooch can be worn at the centre of the necklace. Central part of the necklace detachable and may be worn as two clips or a double clip. Largest diamond detachable, measuring approximately 9.92 x 9.86 x 5.40mm, calculated to weigh approximately 3.20 carats, I colour, VS clarity, as gauged and graded in the mount. Remaining diamonds calculated to weigh a total of approximately 18.00 - 22.00 carats, on average H-J colour, VS-SI clarity, as gauged and graded in the mount. Signs of normal wear to the metal consistent with age and use. 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."