The 'tank' style two-row bracelet set with 56 square-cut sapphires arranged in pairs, further decorated with 28 old European-cut diamonds, one set in each link, weighing a total of approximately 4.20 carats, mounted in platinum, length  7¼ inches. 

Good condition with light surface wear to the mounting. The sapphires are a lively medium-deep blue, eye-clean and with minor abrasions. The diamonds are approximately G-H, VS-SI clarity. Fitted with a safety chain at the clasp and another that runs the length of the bracelet.
In response to your inquiry, we are pleased to provide you with a general report of the condition of the property described above. Since we are not professional conservators or restorers, we urge you to consult with a restorer or conservator of your choice who will be better able to provide a detailed, professional report. 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. Illustrations in the catalogue may not be actual size. Prospective purchasers are reminded that, unless the catalogue description specifically states that a stone is natural, we have assumed that some form of treatment may have been used and that such treatment may not be permanent. Our presale estimates reflect this assumption.
NOTWITHSTANDING THIS REPORT OR ANY DISCUSSIONS CONCERNING CONDITION OF A LOT, ALL LOTS ARE OFFERED AND SOLD "AS IS" IN ACCORDANCE WITH THE CONDITIONS OF SALE PRINTED IN THE CATALOGUE.

Typically known as the Escalier bracelet, this jewel cleverly tricks the eye with contrasting colors in a moving staircase effect.  As seen from one view, the bracelet appears to be all diamonds, but from another angle only sapphires can be seen.  This style was in vogue during the mid 1930s; a similar bracelet can be seen in Melissa Gabardi's Art Deco Jewellery: 1920-1949, p. 199.  While the present bracelet is unsigned, the style was popularized by Boucheron.