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AN UNUSUAL ART DECO DIAMOND AND SAPPHIRE MECHANICAL BROOCH, BY OSCAR HEYMAN & BROTHERS
Of geometric design, the single and old European-cut diamond elongated oval-shaped plaque, enhanced by pear and rectangular-cut diamonds, to the old European-cut diamond terminal, joined to the central single and old European-cut diamond and calibré-cut sapphire circular base, extending similarly-set rotating triangular panels, each accented by rectangular-cut diamonds, mounted in platinum and white gold, circa 1930
With jeweler's marks for Oscar Heyman & Brothers
Of geometric design, the single and old European-cut diamond elongated oval-shaped plaque, enhanced by pear and rectangular-cut diamonds, to the old European-cut diamond terminal, joined to the central single and old European-cut diamond and calibré-cut sapphire circular base, extending similarly-set rotating triangular panels, each accented by rectangular-cut diamonds, mounted in platinum and white gold, circa 1930
With jeweler's marks for Oscar Heyman & Brothers