A pair of Art Deco platinum and old mine diamond tulip brooches, by René Boivin, circa 1930s. A pair of tulip flowers of complementary form set with a total of approximately 7.65 carats of old mine diamonds, mounted in platinum, bearing the maker's mark for René Boivin.
An Art Deco platinum sapphire and diamond ring watch. The hexagonal-shape silvered dial with graduated Arabic numerals and minutes track, to the single-cut diamond and fancy-shape sapphire geometric surround, with foliate engraved sides and plain band. Estimated total diamond weight 1ct. Length of ring head 2.8cms. Weight 11.7gms.
Platinum, Diamond and Black Onyx Brooch Centering a stylized bouquet atop a table, set with 81 old-mine and single-cut diamonds approximately 4.70 cts., within a black onyx circle, circa 1925, approximately 9 dwts.