Palstcho, a rare butterfly wing, ruby and diamond brooch, circa 1920

Palstcho, a rare butterfly wing, ruby and diamond brooch, circa 1920, designed as a butterfly, its wings composed of glazed compartments of iridescent butterfly wing, its body set with cushion-shaped diamonds, its eyes set with circular-cut rubies, wingspan 5.8cm, maker's mark EP for Palstcho, Austro-Hungarian assay mark for 14ct gold, Vienna, and French import assay marks for 14ct gold, French patent inscription